Hey there! :D
If you ever learned about protein synthesis, you probably have heard about how it is made with amino acids. Messenger RNA (a portion of DNA in the nucleus) is taken to the ribosomes (which make the protein) and the code from the DNA is converted to amino acid sequences, therefore, the polymer and correct answer is amino acid. These amino acids, all combined, become protein chains. I would encourage you to look into the process because it is very interesting and very helpful!
I hope this helps!
~kaikers
Proteins are polymers of amino acids. Proteins are large, complex molecules that play essential roles in almost all biological processes.
Proteins are polymers, which means they are composed of repeating units called monomers. In the case of proteins, the monomers are amino acids.
Amino acids are organic compounds consisting of a central carbon atom bonded to an amino group (NH₂), a carboxyl group (COOH), a hydrogen atom, and a unique side chain or "R" group. There are 20 different amino acids commonly found in proteins, each with a different side chain, giving them unique chemical properties.
During protein synthesis, amino acids are linked together through peptide bonds, which form between the carboxyl group of one amino acid and the amino group of another. This process results in the formation of a linear chain of amino acids, known as a polypeptide chain.
The sequence and arrangement of amino acids in a polypeptide chain determine the protein's structure and function. Proteins can have various levels of structural organization, including primary, secondary, tertiary, and quaternary structures, all of which contribute to their specific biological functions.
Proteins are involved in numerous vital functions within cells, such as enzymatic reactions, cell signaling, transport of molecules, structural support, and immune responses. They are the workhorses of the cell, carrying out a diverse range of tasks critical for the survival and functioning of living organisms. Understanding the structure and function of proteins is central to many areas of biology, biochemistry, and medicine.
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An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
The type of plant.The amount of sunlight.The type of music.The type of liquid
Answer:
the type of liquid
Explanation:
All the other variables are the same
The independent variable in this experiment is the type of liquid used.
INDEPENDENT VARIABLE:
Independent variable in an experiment is the variable that is changed or manipulated by an experimenter. The independent variable causes an response in the dependent variable. In this experiment performed on plants to see how different liquids affect plant growth, different types of liquids such as water, apple juice, or milk are used. This means that the type of liquid was the variable that was changed in this experiment, hence, it is the independent variable.Learn more at: https://brainly.com/question/17498238?referrer=searchResults
Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. Cats that have coats that are a patchwork of black and orange are called tortoiseshell cats, are typically female, and have genes that code for both black fur (Xo) and orange fur (XO) located on the X chromosomes. Y chromosomes do not code for color in tortoiseshell cats. A female cat that has only orange fur (XOXO) is crossed with a male cat that has only black fur (XoY). How many of the offspring will exhibit tortoiseshell coloring? 1 in 4. 2 in 4. 3 in 4. 4 in 4.
Answer:
2 in 4
Explanation:
If a female cat with orange fur (XOXO) is crossed with a male cat with black fur (XoY) then:
P: XOXO x XoY
F1: XOXo XOY XOXo XOY
This means that half of the offspring will be females with tortoiseshell color (XOXo) and other half of the offspring will be males with orange fur (XOY).
why do some beaches have bigger waves than others??
This is for a biology assignment called Hawaiian Rabbit Hole
and it said us to choose a topic that made us go you hmmmm or new things you learned and i choosed Why do some beaches have bigger waves than others
Answer: wherever the wind blows :)
Explantation: the waves go 90 degrees to the left (southern hemisphere) or the right (northern hemisphere)
also, if it's blowing away from the beach, it causes upwelling,
which brings nutrients from the bottom of the ocean and attracts more organisms.
hope this helps :)
Well, this depends on the strength of the wind. The stronger the wind, the longer it blows and the longer the fetch, or stretch of ocean over which it blows, the larger the waves.
What two raw materials are needed by plants in order to perform photosynthesis?
Answer:
Water and CO2
Explanation:
Photosynthesis is a process performed by the plants (also some algae and bacteria) in which the energy of sunlight is transformed into chemical energy usable by those plants. Necessary components of this set of reactions are sunlight, water and CO2, while resulting products are glucose and oxygen. Products of photosynthesis are then used in the metabolic processes known as cellular respiration. During the cellular respiration, glucose and oxygen are used for the production of ATP, CO2 and water. Cellular respiration is performed in all living organisms.
Photosynthesis occur in the chloroplast, membrane organelles with photosynthetic pigments (such as chlorophyll).
Final answer:
Plants need carbon dioxide and water to perform photosynthesis, a process that occurs in the presence of sunlight, producing sugars and oxygen.
Explanation:
The two raw materials needed by plants to naturally perform photosynthesis are carbon dioxide and water. During photosynthesis, these materials are used in the presence of sunlight to produce sugars/carbohydrates like glucose and oxygen which are the main products of the process.
The reactions occur within the chloroplasts of the plant cells, where chlorophyll absorbs the sunlight needed to drive the process. During the cellular respiration, glucose and oxygen are used for the production of ATP, CO2 and water. Cellular respiration is performed in all living organisms.
In apples, the allele a is dominant for a big size apple and the allele r is dominant for red color. you cross one tree that produces big yellow apples and another tree that produces small red apples. half of the offspring trees produce big red apples and half produce big yellow apples. what are the genotypes of the parents?
Answer:
AArr and aaRR
Explanation:
The genotypes of the parents are AArr and aaRR.
What is the dihybrid cross?
A breeding experiment conducted between two organisms who are identical hybrids for two traits is called a dihybrid cross. Simply saying,, a dihybrid cross is a cross between two organisms, where both are heterozygous for two different traits. The individuals present in this type of trait are homozygous for a particular trait. These traits are due to the DNA segments which are called genes.
The parents carry different pairs of alleles for each trait in a dihybrid cross. One of the parents carries a dominant allele that is homozygous and the other one carries a recessive allele that is homozygous. The cross produces offspring in the F1 generation which is all heterozygous for specific traits.
Therefore, The genotypes of the parents are AArr and aaRR because a is dominant for a big size apple and the allele r is dominant for red color. One tree that produces big yellow apples and another tree that produces small red apples are crossed. Half of the offspring trees produce big red apples and half produce big yellow apples.
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To signal hunger, the physiological need for food, the digestive tract sends messages to the ________ by way of hormones and nerves.
To signal hunger, the physiological need for food, the digestive tract sends messages to the hypothalamus by way of hormones and nerves.
The digestive tract sends messages to the hypothalamus by way of hormones and nerves to signal hunger.
To signal hunger, the physiological need for food, the digestive tract sends messages to the hypothalamus by way of hormones and nerves. The hypothalamus is a small region in the brain that regulates various bodily functions, including hunger and satiety.
When the body needs food, the digestive tract releases hormones such as ghrelin, which stimulates appetite. The hormones travel through the bloodstream and reach the hypothalamus, where they bind to specific receptors and trigger hunger signals.
In addition to hormones, the digestive tract also sends nerve signals to the hypothalamus. These nerve signals carry information about the state of the digestive system, such as the level of food in the stomach. If the stomach is empty, the nerves send signals to the hypothalamus, contributing to the sensation of hunger.
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A biology student is studying the effects of acid rain on tomato plants. He plants four tomato plants in identical pots, using the same type of soil to fill each pot. He places the pots together in the same location. They receive the same amount of sunlight and water each day. The only difference is the pH of the water used to water the plants. The first plant receives water with a neutral pH of 7, which will allow the student to better determine the effects of giving plants water that is more acidic. The second plant receives water with a pH of 5. The third receives water with a pH of 3. The fourth receives water with a pH of 1. What is the serious flaw in the design of this experiment?
Answer:
he used multiple different types of water the experiment is to broad
Explanation:
he can't compare 4 different ph's in 1 experiment
_______ has a greater partial pressure in the pulmonary capillaries than in the alveoli
Answer:
CO2
Explanation:
Diffusion is a simple process of molecular movement, from their higher concentration to the area with their lower concentration. The process of CO2 movement from the pulmonary capillaries into the alveoli is part of the gas exchange (together with oxygen movenent in opposite direction) and it is actually simple diffusion. Alveoli have huge surface area, thin cell walls and a lot of blood vessels around them. All of these are adaptations that facilitate gas exchange. There is a gradient in partial pressure of the CO2: it is much higher in the pulmonary capillaries than in the alveoili so it moves down its gradient-from the blood to the alveoli (exhale).
Carbon dioxide has a greater partial pressure in the pulmonary capillaries than in the alveoli. This pressure difference allows the carbon dioxide in the capillaries to move to the alveoli and be exhaled.
Explanation:The substance with a greater partial pressure in the pulmonary capillaries than in the alveoli is Carbon Dioxide (CO₂). This disparity arises because the partial pressure of carbon dioxide in the pulmonary capillaries is about 45 mm Hg, while its partial pressure in the alveoli is roughly 40 mm Hg. The pressure gradient facilitates diffusion, allowing CO₂ to move from the blood of the capillaries into the alveoli, where it can then be expelled from the body during exhalation.
This is a contrasting scenario to oxygen (O₂), which has a lower partial pressure in the pulmonary capillaries (40 mm Hg) compared to the alveoli (104 mm Hg). Consequently, due to the pressure gradient, O₂ moves from the alveoli into the capillary's blood, where it bonds to hemoglobin in red blood cells and is transported to tissues throughout the body.
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A qualified genetics counselor is working with a child who has been diagnosed with fragile x syndrome. after extensive research about the condition, she meets with the parents to discuss the features of the disease and the child's prognosis. the session lasted 45 minutes. what cpt® and icd-10-cm codes are reported?
Answer:
CPT® Index - 96040
icd-10-cm code - Q99.2
Explanation:
Here in this case the diagnosis came out with fragility in X chromosome. This is some thing related with medical genetics. Hence, the CPT® Index for this scenario would be 96040. As per the American Medical Association, CPT® Index 96040 cover cases that fall into the category of “Medical Genetics and Genetic Counseling Services” which also involves counseling either with the patient or family for 30 minutes. The icd-10-cm code – Q99.2 deals with the problems associated with genetic abnormality
Hence, the answer is
CPT® Index - 96040
icd-10-cm code - Q99.2
A genetic counselor would report a combination of CPT and ICD-10-CM codes for a session on Fragile X syndrome, which would include medical genetics counseling services and the specific ICD-10-CM code for Fragile X syndrome, F81.82.
Explanation:When it comes to the 45-minute session with a genetic counselor regarding a child diagnosed with Fragile X syndrome, a combination of CPT (Current Procedural Terminology) and ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) codes would be reported. The CPT code used would be reflective of the genetic counseling services provided. This would typically fall under a code for medical genetics and genetic counseling services. The specific ICD-10-CM code for Fragile X syndrome is FMR1 related disorders, including the specific code for Fragile X syndrome, which is F81.82.
It is essential for genetic counselors to provide education on the implications of genetic testing and the advantages and drawbacks of various testing methods, such as amniocentesis or chorionic villus sampling. In this case, the genetic counselor helps the parents understand the inheritance of Fragile X syndrome, the prognosis for the child, and the risks for future offspring.
Which describes the legs of all anthropods. a. They carry poison b. They have claws c. They are jointed d. They store food
Answer: C. They are jointed
Explanation: “arthro” is a root meaning “jointed”
Answer:
C. They're jointed
Explanation:
Anthro= Jointed
Twisted protein fibers that are found within the cells of the hippocampus and certain brain areas are called _____, and an excess of them may be related to the development of alzheimer's disease.
Answer:
Prions
Explanation:
Prions are misfolded proteins found in the brain, they cause other proteins to fold the same way. The cell can't degrade the proteins which leads to an accumulation of these misfolded proteins and the development of neurodegenerative diseases like Alzheimer and Parkinson
Benjy is a preschooler. He can put a dish into the microwave and press the "2" button to cook for 2 minutes. One day he sees his mother wipe the front of the microwave with a damp paper towel before she presses a number button. After that, Benjy rubs the front of the microwave with a napkin before he presses the number button. Why?
It is because little kids and toddlers copy everything that they see other people do. If they see you doing something, then they think they are supposed to do it too, and they copy you. Also they are “like sponges”(that’s what my mom says) and “soak up(/remember) everything”.
Denaturation of dna is a necessary step in southern blotting procedure because it separates double stranded dna into single stranded dna. T/F
The statement, Denaturation of dna is a necessary step in southern blotting procedure because it separates double stranded dna into single stranded dna, is true.
? what does flacc stand for? how old does a child need to be to use the flacc scale for pain? what is the form of evaluation when using the flacc scale?
Answer:
FLACC stands for the Face, Legs, Activity, Cry, and Consalibility scale. Children should be between 2 months to 7 years of age. The form of evaluation is a scale from 1-10 to describe pain.
Explanation:
FLACC stands for Face, Legs, Activity, Cry, and Consolability, and it's a tool used to assess pain in children aged 2 months to 7 years. The scale measures pain through five categories, with caregivers or healthcare professionals observing the child's behavior to gauge pain levels.
Explanation:FLACC stands for Face, Legs, Activity, Cry, and Consolability. It is a tool used to assess pain in children, particularly those who can't express their pain verbally. These five categories help evaluate the physical and behavioral signs of pain. Each category is scored from 0 to 2, providing a total score that can range from 0 (no pain) to 10 (severe pain).
The FLACC scale is typically used for children aged 2 months to 7 years, but it can be also used with older children who are unable to communicate verbally due to cognitive or developmental disabilities. However, for children above 7 years with good communication skills, other pain assessment scales should be used.
When using the FLACC scale, caregivers or healthcare professionals watch and evaluate the child's behavior and expressions to gauge their level of pain. They score each of the five categories based on their observations and sum up these scores to quantify the child's pain level.
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What molecule carries chemical energy that cells use for their functions
Answer:
ATP Adenosine triphosphate
Explanation:
Answer:
ATP
Explanation:
A medical researcher compared the variances in birth weights for five randomly chosen babies of each gender, with the megastat results shown below. the population variances:
Answer: do it yourself
Explanation:
In which of the following environments would you NOT expect to find fossils? (2 points)
Active volcanic islands
An area with high concentration of sedimentary rocks
The Grand Canyon
A shallow ocean
You would generally not be able to recover fossils from volcanic or plutonic rock, so looking around in an area on active volcanic islands would yield nothing.
You always want to look in the layers of sedimentary rock for fossils. The Grand Canyon would be a great place to see these layers as well as a shallow ocean because you may find the remains of prehistoric shark teeth or bones protruding through the surface of the sand.
The answer is Active volcanic islands.
If this is a question in which you can choose more than one answer it may be smart to also choose a shallow ocean as well. This is because it is difficult to get the tools and materials necessary down in the water and would be difficult to get deep enough underneath sand to start digging into actual fossil bearing rock.
So in that case, the answer would then be both Active volcanic islands and A shallow ocean.
Serous fluid in the pericardial cavity __________. serous fluid in the pericardial cavity __________. is a remnant of embryonic development increases friction between the beating heart and the outer wall of the pericardial sac is a slippery fluid secreted by the fibrous pericardium is secreted by the heart itself is secreted by the epithelial cells of both layers of the serous pericardium
Answer:
The correct answer will be option-is secreted by the epithelial cells of both layers of the serous pericardium
Explanation:
Serous fluid is a fluid which resembles the serum of the blood in its color which is pale yellow to transparent.
The serous fluid is present in the cavities of the body organs like in heart, the fluid is present in the pericardial cavity.
The serous fluid lubricates the wall of the heart and is produced by the serous pericardial membranes. The secreted fluid gets collected between the pericardial cavity which helps slide the smooth movement of the serous layer against each other.
Thus, secreted by the epithelial cells of both layers of the serous pericardium is the correct answer.
The serous fluid in the pericardial cavity reduces friction during heart contractions by lubricating the space between the heart and the pericardial sac. It is secreted by a special epithelium called the mesothelium attached to the pericardium.
Explanation:The serous fluid in the pericardial cavity is secreted by the epithelial cells of both layers of the serous pericardium. Specifically, this substance is produced by a simple squamous epithelium known as a mesothelium, which is supported by connective tissue and attached to the pericardium. This fluid has a lubricating function, significantly reducing friction between the heart and the outer wall of the pericardial sac each time the heart contracts.
There are three serous cavities in the body: the pericardial, pleural, and peritoneal cavities. Serous membranes, including the pericardium surrounding the heart, form fluid-filled sacs or cavities and serve to cushion internal organs and prevent friction during movement.
For example, the serous fluid in the pericardial cavity safeguards the heart, while similar fluid in the pleural cavity protects the lungs. All these serous membranes secrete a thin, slippery serous fluid that functions to decrease friction and potentially harmful abrasion among organs.
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Olfactory sensory neurons are short-lived and, therefore, replaced frequently. how does this turnover happen?
Mitotic division and differentiation of basal epithelial cells.
Where can penguins be found in south america
Answer:
only found on the south-western coast ofAfrica, living in colonies on 24 islands between Namibia and Algoa Bay, near Port Elizabeth, South Africa
Answer:
Penguins can be found in South America on the coasts of Chile, Argentina, Uruguay, and Peru. Specifically, some of the most well-known penguin colonies in South America are found in Punta Tombo in Argentina, Isla Magdalena in Chile, and the Ballestas Islands in Peru. Penguins are flightless birds that are adapted to living in cold environments. There are several species of penguins found in South America, including the Magellanic penguin, the Humboldt penguin, and the Galapagos penguin.
Explanation:
The loss of genetic diversity in crop plants can become disastrous. The Irish Potato Famine is an example of this problem. Which of the following is NOT a correct statement about the Irish Potato Famine? Most of the potatoes in Ireland were propagated from cuttings of the same plant. In the mid-1800s, much of the population of Ireland depended on potatoes. The potato originated in Ireland. When the crops were infected by a rot-causing mold, all of the potato plants were susceptible and most were wiped out. Most of the potatoes in Ireland were genetically the same.
Answer:
The correct option is this: THE POTATO ORIGINATED IN IRELAND.
Explanation:
In 1800, the country of Ireland experienced potato famine, during this period a lot of people died from starvation. The principal reason why this event occur is because most of the potatoes in the country at that time were genetically similar. These potatoes were propagated from cuttings of the same plants, thus, their biodiversity level were quite low. This hamper their ability to resist the fungal disease that destroyed all the potatoes in the country at that time. The variety of potato planted in Ireland at the time of famine was lumper potato, this potato specie originated from another country.
Final answer:
The incorrect statement about the Irish Potato Famine is that 'The potato originated in Ireland.'
Explanation:
The statement that "The potato originated in Ireland" is NOT correct about the Irish Potato Famine. The Irish Potato Famine, which occurred from 1845-1852 AD, demonstrated the consequences of low crop diversity when a single variety of potato, which did not originate in Ireland but in South America, became highly susceptible to a potato blight.
This susceptibility led to the crop being wiped out, causing mass famine, death, and mass emigration. Most of the potatoes in Ireland were indeed genetically the same, as they were propagated from cuttings of the same plant. This genetic uniformity, along with a heavy dependency of Ireland's population on potatoes as a staple food, compounded the disaster when the crops were infected by a rot-causing mold.
Over evolutionary time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?A. Natural selection cannot account for losses, only for innovationsB. It can account for these losses by the principle of use and disuseC. Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefitsD. These organisms had the misfortune to experience harmful mutations, which caused the loss of these structures over a few generations
Answer:
C. Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits
Explanation:
Natural selection is evolutionary mechanism which favors traits (structures, behavior) of an organism that help him survive and reproduce. But, when there are some structures of an organism that are useless, selective pressure acts against them. Structures that don't contribute to an organism’s survival and reproduction, but are not directly harmful will take long time to be eliminated.
How evolution has been both beneficial and detrimental to the human species
Evolution is a term derived from word "evolve" which means "to unroll" or a process of development where organism reached a final destination. In scientific terminology, evolution also means almost similar, the process in which living organisms adapt themselves with respect to the environmental fluctuations by bringing some changes in their genetic makeup.
Though this is an inevitable process which is not in control of a certain living organism, therefore it has both positive and negative effects on species.
Beneficial aspects:
Evolution is the process which helps the organisms to survive when there are detrimental environmental hazards. In this process some organisms of a specie die while the others go through some genetic modification in such a way that they are better able to bear those environmental constraints and survive. This fittest and survived specie then reproduce superior offspring that are better able to withstand that environmental fluctuation in future. In simple terms we can say that evolution is a key process which makes specie more fit.
Harmful aspects:
Since evolution is just a hit and trial mechanism in which DNA undergoes some modifications in organism so the results are not always certain goal oriented. One devastating effect of evolution is parasitism which causes deadly effects for humans. There are some viruses and bacteria which are disease causing and when we are able to kill them with antibiotics they undergo evolution and form stronger parasites which are more difficult to combat the next time. This process has created a resistance for multiple strains of bacteria and the medical world is worried with the troublesome effects of this evolution in diseases like tuberculosis and AIDS.
Therefore, evolution is both beneficial and harmful for species.
Hope it helps!
The rainforest contains half of the Earth’s wildlife and at least two thirds of its plant species. It can hold great quantities of water and is very important to the planet’s water cycle. Rainforests remove vast amounts of CO2 from the atmosphere and replace it with oxygen. Which of the following statements best summarize the above information about rainforests?a.The majority of the planet’s oxygen is generated from the rainforest.b.Two-thirds of all plants originated from the rainforest.c.The rainforest is a major catalyst for the planet’s water cycle.d.The rainforest is important to life as a whole on the planet. Please select the best answer from the choices provided
D.The rain forest is important to life as a whole on the planet.
Answer: d. The Rainforest is important to life as a whole to the planet
Explanation: option D best summarizes the information because the whole processes described are all essential in sustaining life as it is more encompassing that the other options. Plants therein sequestering carbondioxide and releasing oxygen is the process of photosynthesis, sugars are also produced which give life as food to a variety of animals. Plants and animals also avail themselves of the great quantities of water held by the plants. Thus the whole cycle produces more plants and animals to replace dying ones thereby preserving life.
When elliot engages in intense exercise, particularly in cold weather or during allergy season, his bronchial tubes fill with mucus and contract. this causes him to cough and have serious breathing difficulties. elliot has
a. nocturnal enuresis.
b. emphysema.
c. bronchitis.
d. asthma?
What is the relationship between an amino acid and a protein?
Answer:
Amino Acids make up proteins
Explanation:
Amino acids are the monomers of proteins.
If two organisms possess similar structures that serve similar functions but don't possess a common ancestor that shared that structure, then the structures are classified as A. homologous. B. morphologies. C. vestigial. D. analogous.
Answer:
D. analogous.
Explanation:
Analogous organs can be defined as organs, which show similar functions, but do not having common origins. Organisms that possess analogous organs do not share common ancestor as their organs are derived from different origins.
Examples of analogous organs include wings of bats, birds, and birds which are evolved independently, but share common function (flying).
Thus, the correct answer is option (D).
Answer:
D. analogous
Explanation:
Analogous organs can be defined as organs, which show similar functions, but do not having common origins. Organisms that possess analogous organs do not share common ancestor as their organs are derived from different origins.
Examples of analogous organs include wings of bats, birds, and birds which are evolved independently, but share common function (flying).
Dietary fats that are solid at room temperature are
animal fats are solid at room temperature but plant fats are liquid.
The lacZ and lacY genes are transcribed when:glucose levels are high and lactose levels are low.lactose is absent and glucose levels are high.glucose levels are low, regardless of the level of lactose in the cell.lactose is present, regardless of the level of glucose in the cell.lactose is present and glucose levels are low.
Answer:
lactose is present and glucose levels are low
Explanation:
Lactose operon or lac operon (includes lacZ and lacY genes) is found in some bacteria and the products of its genes are involved in lactose metabolism. So, this operon is active (genes are transcribed) when lactose is present and glucose is absent. The operon is regulated by the lac repressor which acts as a lactose sensor and catabolite activator protein (CAP) which acts as a glucose sensor.
When there is lactose (in the form of allolactose) lac repressor detects it and stops being repressor. This enables transcription.
CAP detects glucose (via cAMP) and activates transcription when glucose levels are low/
The lacZ and lacY genes are transcribed when lactose is present and glucose levels are low. This occurs because allolactose, an inducer, prevents the repressor protein from binding to the operator, allowing transcription to occur. Additionally, low levels of glucose activate the transcription through the cAMP-catabolite activator protein (CAP) complex.
Explanation:The lacZ and lacY genes are transcribed when lactose is present and glucose levels are low. The lac operon is a classic example of an inducible operon, meaning that it is only transcribed under specific conditions. When lactose is present, it is converted to allolactose, which acts as an inducer and prevents the repressor protein from binding to the operator. Additionally, when glucose levels are low, cAMP binds to the catabolite activator protein (CAP), which then activates the transcription of the lac operon.
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Which of the following is a possible advantage for the environment of having farmers use plants that genetically produce Bt toxin?A) Plants with genes for the toxin are eaten less often by insects, and therefore less insecticide is needed.B) Plants that produce Bt toxin must be grown from new seeds each season, and therefore fewer of them are planted.C) Bt toxin is advantageous to many species of invertebrates that grow in the same fields.D) Harvesting plants with these genes is less disturbing to the soil layers where they are planted.E) Plants with these genes must be sprayed with the organism, but need much less than other plants.
Answer:
A) Plants with genes for the toxin are eaten less often by insects, and therefore less insecticide is needed.
Explanation:
Bt endoxin is lethal for some insects that ingest it (it is effective insecticide). Because of that, gene for the toxin is often used in the genetic engineering of certain plants, in order to reduce the use of pesticides. Unlike pesticides, which are unspecific (kill all insects, even those benefitial), Bt plants are a bit more specific.
Another advantage is that it has been shown that Bt corn is safe for human consumption.