Answer:
The correct answer is: C. Catalysts are used up during a chemical reaction.
Explanation:
Catalysts are substances used in chemical reactions to speed them up. Many of our bodily functions require the use of catalysts to function at the rate we need them. The catalyst is not consumed during the reaction - because of this, catalysts can be re-used.
Catalysis is possible thanks to the presence of catalysts. Catalysts provide alternate pathways with the lower activation energy for the chemical reactions. Activation energy refers to the energy required for a reaction to happen. When there are no catalysts around, the activation energy is much higher, and thus the reaction is harder to achieve.
Catalysts in the body are called enzymes. Outside our bodies, there are also many catalysts, like heterogeneous catalysts, homogeneous catalysts, and photocatalysts.
A 30-year-old patient undergoes a dental procedure, which results in abnormally prolonged bleeding. the presence of which other symptoms would lead a physician to diagnose her with von willebrand disease? select all that apply.
The most serious complications of bulimia and anorexia nervosa include
After 3 hours of exercise, what are the main sources of energy?
After 3 hours of exercise, the body primarily uses fatty acids and ketone bodies for energy. Muscle glycogen is used up quickly, followed by blood glucose and increased fat metabolism. If exercise continues for extended periods, protein can also be broken down for glucose.
Explanation:After 3 hours of exercise, the main sources of energy for the body are fatty acids and ketone bodies. When muscle glycogen stores are depleted, which happens within the first few minutes of high-intensity exercise, the body then transitions to using blood glucose and fatty acids as the primary sources of energy.
Glucose can still contribute to energy production through the bloodstream, particularly if it's been recently ingested through diet. If exercise continues for an extended period or at lower intensity, fatty acid metabolism increases, and the body begins to utilize these fats more predominantly. Eventually, if the body is subjected to starvation or continued long-duration exercise, it will start producing ketone bodies from fatty acids as an alternative energy source.
Proteins are usually conserved during exercise but can be broken down to glucose in situations of energy deficit or extended duration activities. In summary, following exhaustive exercises like those spanning 3 hours, fat stores and any circulating blood glucose become the principal sources of energy for the body, with ketone body production coming into play thereafter.
A young infant may believe that a bird is more like an airplane than an animal if the infant uses:
A young infant may see a bird like an airplane if the infant uses:
“Perceptual categorization”
Perceptual categorization is when something is directly categorized to be a part of a group when similar characteristics are observed. So in this case since the bird was flying, then the infant automatically recognizes it as a plane.
_____ are substances that are capable of enabling as well as inhibiting the flow of electricity.
a. insulators
Answer:
The answer is semiconductors
Explanation:
a. True
b. False: greenhouse gases emit longwave radiation and some of this radiation is directed towards the surface of the earth. question 2 options:
a.true
b.false
Answer:
TRUE !
Explanation:
Name the thin tissue that holds the organs in place in the body cavity
A scientist that is determining taxon based on genetic similarities is relying on
Relying on Morphology.
With the exception of echinoderms, invertebrates are _____; chordates, echinoderms, and vertebrates are _____. soft-bodied; hard-bodied acoelomates; coelomates protostomes; deuterostomes radially symmetrical; bilaterally symmetrical
Substances formed by joining smaller molecules together are called
The ________ surrounds the third ventricle and its two most important structures are the _______.
Covered by the two cerebral hemispheres, the diencephalon is the structure of the central nervous system that surrounds the third ventricle. It is composed of several other structures. The most important of them are the Thalamus, which plays a very important role in movements and emotions; and the Hypothalamus, which provides functions including thermoregulation, appetite and regulation of the sleep-wake cycle.
If an individual is a carrier of an infectious disease, he is __________. if an individual is a carrier of an infectious disease, he is __________. both symptomatic and noninfective infective both asymptomatic and infective asymptomatic
An individual who is a carrier of an infectious disease is both asymptomatic and infective. This means they do not show symptoms, but can still transfer the disease to others, often via direct or indirect transmission mechanisms. Thus, carriers play a significant role in the propagation of infectious diseases.
Explanation:If an individual is a carrier of an infectious disease, he is both asymptomatic and infective. This means that while they do not show any symptoms of the disease, they can still transmit the disease to others. A good example is the herpes simplex virus, which may not present any noticeable signs or symptoms in most infected individuals.
Disease spreading in this way is referred to as a propagated spread, essentially progressing from person to person through a population of susceptible individuals. This can happen directly, with close person-to-person contact, or indirectly, via contaminated objects or surfaces, airborne inhalation of droplets or aerosols, or even through a vector such as an insect. Despite being asymptomatic, a carrier can have a major role in the spread of infectious diseases.
While a 'carrier' can also refer to an individual who can transmit a recessive genetic disorder to offspring without showing any symptoms, in the context of an infectious disease, a carrier is an infected individual who can transmit the contagious pathogen to others, whether or not symptoms are currently present.
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Kim wants to grow some more plants in her garden. she has to plan carefully because she has an allergy to plant pollen. which plant should she not plant in her garden? dandelion, because it is wind-pollinated sweet cherry, because it is pollinated by flies blackberry, because it is bee-pollinated nextreset
The correct answer is A. Dandelion, because it is wind-pollinated.
The diagram shows one process during sexual reproduction. After fertilization, the zygote contains 28 chromosomes. What is the number of chromosomes (n) present in the gametes?
A) 7
B) 14
C) 28
D) 56
Answer:
The correct answer would be B) 14.
In sexual reproduction, gametes are haploid cells formed after meiotic division of germ cells.
Meiosis is a cell division which results in the formation of four daughter cells from a single parent or germ cell. Each daughter cell contains half the number of chromosome present in the parent cell.
The haploid gametes fuse to form diploid zygote that is, the fertilization restored the diploid chromosomal number.
Now, the number of chromosomes in the zygote is 28. Thus, the number of chromosomes in gametes must be half of 28 that is, 14.
What essential bodily fluid can an astronaut’s body stop producing if his or her hips are exposed to solar flares?
Episodes of overeating (typically high-calorie foods) followed by vomiting, laxative use, fasting, or excessive exercise are common in individuals with
The relation between amino acid and polypeptide is similar to the relation between ________.
The relation between amino acid and polypeptide is similar to the relation between NUCLEOTIDE and NUCLEIC ACID.
The primary structure of the polypeptide chain is composed of 20 different classes of amino acids held together by peptide bonds.Thus, amino acids represent the building blocks of polypeptides (i.e., proteins).In a similar way, nucleotides are building blocks of nucleic acids (both DNA and RNA).On the other hand, monosaccharides (e.g., glucose) are building blocks of polysaccharides (e.g., starch).In conclusion, the relation between amino acid and polypeptide is similar to the relation between NUCLEOTIDE and NUCLEIC ACID.
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The relation between amino acid and polypeptide is similar a leading to a longer chain.
Explanation:The relation between amino acid and polypeptide is similar to the relation between monosaccharide and polysaccharide in carbohydrates. Just like amino acids are the building blocks of polypeptides, monosaccharides are the building blocks of polysaccharides. Both amino acids and monosaccharides can link together through specific bonds to form longer chains.
How is the growth of land plants proof that there is carbon in the atmosphere? How does carbon exist in the atmosphere, biosphere, and geosphere all at the same time?
Answer: 1 The growth of plants shows that there is a pressence of carbon in the atmosphere. The plants take carbon dioxide and sunlight from the atmosphere for the process of photosynthesis, this provides food to the plants. This food helps in growth and development of the plants and this proves that .
Answer: 2 The carbon exists mainly in the form of carbon dioxide in atmosphere, organic matter in the biosphere and coal, graphite, diamond in geosphere.
Why is it important that nadp+ reductase is on the stromal side of the thylakoid membrane?
The NADP+ reductase is present on the outer side of the thylakoid membrane so as to release NADPH on the stromal side where it can be used during dark reaction along with ATP to form glucose.
Further Explanation:
The light reaction or energy-producing phase of photosynthesis takes place in the thylakoid membrane forming ATP and NADPH. These molecules are then utilized during the dark reaction to produce sugars that occur in the stroma. The ATP is the energy-storing molecule while NADPH is the reduced electron carrier.
NADP+ reductase or ferredoxin NADP+ reductase (FNR) is an enzyme that catalyzes the last step of the light reaction during photosynthesis that is the transfer of electrons from ferredoxin (reduced) to NADP+ and results in the formation of NADPH and ferredoxin (oxidized). This enzyme is located on the outer periphery of the thylakoid membrane. When FNR accepts electrons from ferredoxin it releases NADPH on the outside of the thylakoid membrane or the stroma as FNR faces outwards. NADPH cycling is a vital step and can occur only in the presence of light. The stromal side provides optimal light for the reaction to take place.
The ATP is also formed in the light reaction as the movement of electrons from one carrier to another releasing some sort of energy which is used to pump proton (H+) to the lumen from the stroma. The transfer of protons back to the stroma takes place through ATP synthase resulting in the formation of ATP.The ATP and NADPH are formed on the stromal side and are used in the dark reaction to proceed photosynthesis further and form a glucose molecule from carbon dioxide.
Therefore, the presence of NADP+ reductase on the stromal side is important so as to form NADPH on the outer side and perform the NADPH cycling efficiently.
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Answer Details:
Grade: College Biology
Subject: Biology
Chapter: Photosynthesis
Keywords:
Photosynthesis, light reaction, dark reaction, thylakoid membrane, stroma, lumen, NADP+ reductase, FNR, ATP, NADPH, ferredoxin.
What is the relationship between the energy charge of a cell and control of the atp-generating pathway?
_____ 8. destroy pathogens on the outer body surface, at body openings, and on inner body linings
In which stage of the cell cycle was the nucleus with 6 picograms of dna?
A human with the karyotype 49, xxxyy forms _______ barr bodies.
What is the significance of the red blood cell being anucleate?
Excellent water supply can reduce the morbidity from typhoid fever by what percentage (potentially)?
How does the input of olfactory information to the brain differ from other sensory input pathways?
a. it does not require the cortex for higher order processing.
b. direct connections to the thalamus are not made before information reaches the cortex.
c. the first direct connection is to the thalamus and not to the medulla.
d. prior to making connections with the medulla, sensory input travels through the spinal cord?
In emphasizing that genetic influences on behavior depend on a personʼs home environment, psychologists are highlighting the importance of:
The development of the _____________—with its small size, absence of heat, and low cost—made personal computers possible
In general, which factor is NOT critical when beginning an exercise program? A. using appropriate protective equipment during exercise B. finding friends who like to exercise the same way you do C. seeing your doctor for a physical assessment prior to beginning exercise D. choosing clothing that is designed to match your exercise program Please select the best answer from the choices provided. A B C D
The correct answer is option B. finding friends who like to exercise the same way you do
In the beginning of the exercise program, it is advised to were appropriate clothing as well as use protective equipment, so that the person is not injured and can do the exercise comfortably. It is also advised to go for a physical assessment before starting exercise, so that, any ailment cannot harm the person during exercise. But, finding friends, who are interested in same type of exercise is completely optional. It is better if you find friends, but it is not at all necessary.
Answer:
B
Explanation:
Which type of membrane would be present in the largest quantity in a prokaryotic cell?
The membrane, which is present in the largest quantity in a prokaryotic cell is the cell membrane.
• The cell membrane also known as the plasma membrane separates the cell from the outside environment.
• It monitors the movement of organic molecules, water, ions, oxygen, and certain wastes into and out of the cell.
• The cell membrane protects the cell.
• The cell membranes are generally formed of fatty-acid-based lipids and proteins.
It is the cell membrane or the plasma membrane, which is present in the largest concentration in a prokaryotic cell.
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