Facilitated diffusion is the movement of molecules across a cell membrane via transport proteins without energy input, following their concentration gradient. Materials like glucose and amino acids are the prime examples and use carrier or channel proteins, such as aquaporins for osmosis, to cross the membrane.
Facilitated diffusion is a process where polar molecules or ions pass through the cellular membrane with the aid of specific transport proteins. Unlike active transport, this process does not require energy because molecules move down their concentration gradient. Examples of facilitated diffusion include the transport of glucose and amino acids across a cell membrane. Transport proteins that are involved in facilitated diffusion can be channel proteins or carrier proteins.
For instance, glucose will bind with a specific transport protein, forming a complex that can cross the cell membrane. Similarly, aquaporins are channel proteins that enable water molecules to pass through the membrane, assisting in osmosis.
When mediated transport involves two substances using the same channel protein, it can be referred to as symport or antiport dynamics, depending on the direction of transport for each of the substances.
What portion of the molecule in model 1 is responsible for the "-lipid" part of the name?
Concept map how is genetic information packaged masteringbiology
The DNA or deoxyribonucleic acid along with the protein is known as chromatin. In addition to certain proteins, the DNA is packaged.
Further Explanation:
The genetic information is known to be packaged in 23 sets of chromosomes. In these, histones which are the proteins that aid the molecule of DNA to be very tightly packed in added and also aids in maintaining the double-helical structure of the DNA.
Each chromosome comprises of genes. Gene refers to the sequence of the nucleotides which mainly encode for a protein having a specific function. Allele refers to the variant type of the gene. The nucleotides found in the gene can be adenine, guanine, thymine, uracil, and cytosine. These nucleotides make a DNA or an RNA molecule.
DNA undergoes a replication process wherein duplication of the double-helical structure takes place. It then moves further and forms RNA molecule through a process called transcription. RNA undergoes RNA processing followed by post-transcriptional modifications which further release out mRNA, rRNA, and tRNA molecules. All the 3 kinds of RNA enter into the last phase of central dogma called translation. During this, the proteins are formed.
Learn more:
Learn more about component of DNA https://brainly.com/question/334927 Learn more about base pairing https://brainly.com/question/2491455 Learn more about RNA base pairing https://brainly.com/question/2416343
Answer Details:
Grade: High School
Subject: Molecular Biology
Chapter: Gene Expression
Keywords:
DNA, RNA, concept map, replication, double helical, nucleotides, transcription, proteins, translation, mRNA, rRNA, tRNA.
Diets laden with hormone-mimicking chemicals are suspected of contributing to girls' earlier experience of
in terms of bases the difference between DNA and RNA that DNA has blank and RNA has blank
Final answer:
The difference between the bases in DNA and RNA is that DNA contains thymine, while RNA contains uracil instead. Thymine and uracil are structurally similar but are used differently in DNA and RNA molecules.
Explanation:
One of the main differences between DNA and RNA is the type of nitrogenous bases they contain. DNA has adenine, guanine, cytosine, and thymine, whereas RNA contains adenine, guanine, cytosine, and uracil. While both nucleic acids have adenine, guanine, and cytosine, the fourth base in DNA, thymine, is replaced by uracil in RNA. Uracil is structurally similar to thymine but lacks a methyl group, differentiating it significantly within the RNA molecule.
In the structure of these nucleic acids, each nucleotide is composed of a base, a pentose sugar, and phosphate groups. For DNA, the sugar is deoxyribose, and for RNA, it is ribose. This difference in sugars contributes to the different functional properties of DNA and RNA. Consequently, thymine pairs exclusively with adenine in DNA, while uracil pairs with adenine in RNA during the process of protein synthesis.
Which of the following is a limited resource, which can take longer to be replenished than it takes to be used up? A. Copper metal B. Drinking water C. Sun rays D. Natural gas
Answer:
B. Drinking water
Explanation:
Natural gas is a nonrenewable resource that is consumed faster than nature can replenish it. With current consumption rates, reserves are estimated to run out in about 120 years, which makes natural gas the correct answer to the question.
The question pertains to identifying a resource that is used up more quickly than it can be replenished. Among the options provided, natural gas fits this description. It is considered a nonrenewable resource, meaning that it exists in a fixed amount within the Earth and cannot be quickly replenished over human time scales.
Natural gas is formed over millions of years from the remains of ancient plants and animals. At the current rates of consumption, natural gas reserves are estimated to be exhausted within about 120 years. Unlike renewable resources such as sunlight or wind which are consistently replenished by natural processes, once natural gas is used, it is gone for good and cannot be recreated within a timespan relevant to human needs.
Nonrenewable resources such as coal, oil, and natural gas are subject to economic forces and may be abandoned in favor of less expensive or more environmentally friendly alternatives but remain imperative to current global energy needs. Therefore, option D, natural gas, is the correct answer to which resource can be used up faster than it can be replenished.
What do the following areas of scientific understanding have in common? the understanding of the structure of the Solar System the understanding of how traits are passed from parents to offspring the understanding of the building blocks of matter and life A. There is no scientific knowledge related to these areas of science. B. We know all there is to know about these areas of science. C. The scientific knowledge related to these areas has changed over time. D. The scientific knowledge related to these areas has remained unchanged since their discovery.
Answer:
The scientific knowledge related to these areas has changed over time.
Explanation:
1. Which of the following molecules is broken down in cellular respiration, providing fuel for the cell?
2. Which energy-rich molecule produced by cellular respiration directly powers cell work?
3. Examine this reaction:
starch⟶amylasedisaccharides⟶disaccharidasemonosaccharides
If there is the normal amount of amylase present but less disaccharidase than usual, which of the following would most likely happen?
4. Examine the reaction below, and then answer the question.
A+B⟶Enzyme1C+D⟶Enzyme2E+F⟶Enzyme3G+H
Absence of which enzyme would cause the greatest reduction in the production of G and H?
how many glucose molecules can be formed by 6 molecules of carbon dioxide
Alexander graham bell studied the human ear and noticed how sounds were transmitted when a membrane (the eardrum) vibrated. he applied this knowledge to the development of the telephone, using a similar process of vibration of a membrane. which cognitive process did bell demonstrate?
Alexander Graham Bell demonstrated the cognitive process of applying knowledge from the study of the human ear to the development of the telephone.
Explanation:Alexander Graham Bell demonstrated the cognitive process of applying knowledge from one domain (the understanding of the human ear and sound transduction) to innovate in another domain (the development of the telephone). By studying how the eardrum and the other structures of the ear, such as the ossicles and cochlea, work to convert sound waves into electrical signals that the brain interprets as sound, Bell was able to emulate this process technologically. This is evident in how the telephone transmits sound by converting the sound waves into electrical signals that can be sent over wires and then turned back into sound at the other end, mirroring the natural process of hearing.
Which trait indicates that a resource is nonrenewable?
A. It has a very high demand. B. It can never run out. C. It is never replenished. D. It is replenished at a very fast rate.
Answer: Option C.It is never replenished.
Explanation:
A non-renweable resource is a resource which is associated with some economic value and is beneficial to use but has a disadvantage that it cannot be renewed by natural processes or it is used faster than it can be renewed.
An example of a non-renewable resource is the fossil fuels which take millions of years to form and thus, cannot be renewed at the rate which matches human consumption.
How many acetyl-coa molecules are involved in forming hmg-coa during ketogenesis?
What information provided by jamie would lead the physician to suspect a systemic disease?
how does increasing light intensity affect rate of photosynthesis in vascular aquatic plants
What Represents the presence of the rhesus protein on blood
The Rh factor represents the presence of the rhesus protein on blood.
Rh+ blood contains the rhesus protein.
Rh- blood does not contain the rhesus
The substance known as ____________ is full of sugars and amino acids, and is the waste product of some plant feeding insects.
Honeydew is a sugary, nutrient-rich substance excreted by certain plant-feeding insects like aphids, offering a vivid instance of biotic interactions and symbiotic relationships in ecosystems.
Explanation:The substance known as honeydew is full of sugars and amino acids, and is the waste product of some plant feeding insects. This phenomenon can be observed in the biotic interaction involving plants, aphids, and ants. Aphids, which are considered insect herbivores, feed on the plant's phloem sap, which is rich in sucrose but low in amino acids. To fulfill their nutritional needs, aphids consume large amounts of phloem sap to obtain the necessary amino acids, subsequently excreting the excess sucrose as honeydew. This honeydew is then utilized by ants, which in turn protect the aphids from predators, establishing a symbiotic relationship. Other insects such as leafhoppers and mealybugs also produce honeydew by feeding on the plant's phloem sap.
Honeydew serves as a food source for various organisms, including ants which often "herd" the sap-sucking insects in a mutualistic relationship, and sooty mold fungus that thrives on the sugary fluid. This dynamic illustrates the complexity of ecological interactions and the role of insect excretions in the nutrition of other species.
Your patient has recently completed her first round of chemotherapy in the treatment of lung cancer. when reviewing this morning's blood work, what findings would be suggestive of myelosuppression?
When there is myelosuppression, the suggestive finding is there is a decrease in the platelets and red blood cells. Also called the bone marrow suppression, myelosuppression is a common side effect of the treatment of chemotherapy. When this side effect happens, there is a decrease in the production of blood cells. The result which may be the effect of myelosuppression is a decrease in one, two or all three types of blood cells. Most patients of chemotherapy experience a decrease in red blood cells. Another effect is the decrease of white blood cells by most patients. Myelosuppression will be subcategorized as neutropenia when chemotherapy results to the reduction of neutrophils which is a specific type of white blood cells. Thrombocytopenia is the term for a drop in platelet numbers. This kind of suppression is not that common. Only 10 percent of cancer patients undergo the negative effects of this kind of suppression.
All organisms are composed of cells. the size and shape of a cell determines how well it can deliver nutrients to its interior. since all cells and organisms depend upon the efficient delivery of gases, nutrients, and other important molecules, the relationship between a cell's surface area and its volume is an important regulating concept
The SubGroup That Comes after genus is ______?
A.Species
B.Order
C.Family
D.Kingdom
15Points And BrainPower :D
In each and every ecosystem, the subgroup that comes after genus is species in biological classification.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
https://brainly.com/question/1673533
#SPJ2
N-linked oligosaccharides can be covalently linked to proteins at which amino acid?
Final answer:
N-linked oligosaccharides are covalently linked to the amino acid asparagine in proteins, specifically at Asn-x-Ser/Thr motifs, through a process called N-glycosylation.
Explanation:
N-linked oligosaccharides can be covalently linked to proteins at the amino acid asparagine (Asn), specifically at the sequon Asn-x-Ser/Thr motifs, where 'x' can be any amino acid except proline. This form of glycosylation, referred to as N-glycosylation, begins in the rough endoplasmic reticulum (RER) and continues as proteins are processed through the Golgi apparatus.
The inclusion of oligosaccharides is crucial for proper protein folding, stability, cell-cell recognition, and immune response. There are also other forms of glycosylation such as O-glycosylation, where the oligosaccharides are attached to the hydroxyl group on serine (Ser) or threonine (Thr), but the student's question specifically refers to N-glycosylation at asparagine residues.
part of a mountain that weathers the fastest
Answer:
mountain peak
Explanation:
Which structure prevents backflow of duodenal contents into the stomach?
A. Pylorus
B. Fundus
C. Antrum
D. Cardia
Which elemental halogen would you predict is the most stable, upon mixing with other halides?
Final answer:
Iodine forms the most stable halide ions due to its large atomic radius, which allows for a more even distribution of the negative charge, making its conjugate base more stable than other halogens like fluorine.
Explanation:
The stability of halogens when mixed with other halides depends on various factors including electronegativity, atomic size, and the ability to spread out negative charge. Among the halogens, fluorine is the most electronegative but it is also the least stable when forming halide ions, making it the most basic due to its small atomic size. On the other hand, iodine with a significantly larger atomic radius allows for better distribution of the negative charge on the iodide ion, which increases the stability of the conjugate base.
Therefore, taking into account the atomic size and electronegativity, iodine typically forms the most stable halide ions upon mixing with other halides, as stability increases with the size of the halogen atom. This is further supported by the trend that the acidity of haloacids increases as we move down the group in the periodic table, corresponding to an increase in halogen atomic size and consequently, more stable halides.
How can your health be improved by decreasing your intake of concentrated sweets?
Specialized proteins that act as catalysts for chemical reactions are _____.
carbohydrates
lipids
enzymes
nucleic acids
Answer: Catalyst
Explanation: The specialized protein that acts as catalyst are enzymes. They increase the rate of the reaction by lowering the activation energy.
The activation energy is the minimum energy which is required to start a reaction.Enzymes do not take part in the reaction but it enhances the rate of reaction and enzyme is available again for another set of reaction.
The enzyme forms complex with the substrate and then substrate is converted into product and enzyme is made available for another reaction.
Why is blood directed away from nervous system when you overeat?
The blood is directed away from the nervous system and directed to the organs. It helps controls hypertension, digestion, immune function, reproductive needs, etc. Vasoconstriction happens to let the blood to the organs for this purpose. The muscles are what need the blood, instead of our organs.
The case of the system unit is made of metal or plastic and protects the internal electronic components from damage.
a. True
b. False
Final answer:
The statement is true, as computer cases are meant to protect a computer's internal components from damage and are typically made from a combination of metal and plastic to also ensure electrical safety and aid in heat dissipation.
Explanation:
The statement that the case of the system unit is made of metal or plastic and protects the internal electronic components from damage is true. Computer cases, also known as chassis, are indeed designed to shield the delicate internal components from external harm such as physical impact, dust, and electromagnetic interference. They are most commonly constructed from metals like steel or aluminum which also support heat dissipation and plastics which might be used for aesthetic or cost reasons, as well as to avoid conductive materials on certain surfaces. The cases also typically incorporate insulation material and measures for electrical safety to ensure user protection.
What characteristics of beets make them useful as experimental models for studying cellular membranes?
Final answer:
Beets are beneficial for cellular membrane studies because they allow visualization of membrane integrity and analysis of membrane permeability, including the features of channels and carriers related to selective permeability and functions in cell signaling.
Explanation:
Beets are useful as experimental models for studying cellular membranes because of their pigmented vacuoles, which are contained within a single membrane. When beet cells are damaged, they release a red pigment, which makes it easy to visualize the integrity of the cell membranes. Furthermore, because beets have a high concentration of transporter proteins, they can be applied to study membrane permeability and features such as channels and carriers. This is crucial to understanding selective permeability, which refers to a cell membrane's ability to selectively allow certain ions or molecules to enter or exit the cell. The structure of cell membranes, as described by the fluid mosaic model, explains why cells can still maintain their integrity and how they are involved in cell-cell recognition and signaling, crucial aspects for cellular function.
An elderly woman with a history of coronary bypass comes in with severe, diffuse, abdominal pain. strangely, during your examination, the pain is not made worse by pressing on the abdomen. what do you suspect?
Ischemia is suspected in this case. If there’s history of bypass, it can be used as a clue to see if there is vascular narrowing elsewhere. Malingering is unlikely. However, neuropathic pain as seen in herpes zoster, would get worse with touch.
Which term refers to the attraction to water molecules?
What is the purpose of rifampicin in the experiment?