1.What chemical characteristic distinguishes proteins from6. At which time point
ID: 257952 • Letter: 1
Question
1.What chemical characteristic distinguishes proteins from6. At which time point in the image from the previous question mucleic scids AND lipids? is there NO concentration gradient for this molecule across the A) They are not polymerizod and have large hydrocarbonmembrane? B) They are large polymers that are completely hydropbilic B) Time B A) Time A D) Time A and B E) There is a gradient at all of these time points and can interact to form double strands C) They contain large amounts of nitrogen and phosphorous D) They are large polymers with both hydropbilic and 7. How are new alleles, such as the O blood type allele, first generated in a population? rydrophobic portions with complex three dimensional 2. When a person stops ingesting alcohol, their cells don't need as much ADH enzyme. How would the cells in this individual A) Because the new protein is needed by the individual B) Random errors in DNA replication C) Non-disjunction in mitosis D) None of these errors could generate a new allele reduce production of this enzyme until it is needed again? A) Mutate the DNA in that gene B) Stop transcription of that gone C) Remove ribosomes from the cell D) Remove amino acids from the cytoplasnm E) All of these are equalily likely methods 8. Non-competitive enzyme inhibitors, allosteric regulators, and ture can all affect enzyme activity. What enzyme characteristic do all three of these regulators modify? A) Enzyme saturation 3. What is the MOST accurate description of molecular difusin? B) Number of enzymes produced in the cell A) Movement of molecules from high to low B) Movement of molecules from low to high C) Enzyme localization D) Movement of enzymes E) Enryme shape 9, How can you locate the backbone of an amino acid? C) Random movement of molecules D) Movement of molecules across a membrane from high A) Find a carbon attached to an amino and carboxyl B) Find a carbon in sugar attached to a phosphate group C) Find a carbon attached to an amino and phosphate gc D) Find a carbon attached to an amino and sulfhydryl group E) Find a carbon attached to an hydroxyl and carboxyl grou to low concentration E) Movement of molecules across a membrane from low to high concentration 4. Some specific changes in amino acid composition can disturb ability of an enzyme to bind to its substrate. To disturb binding 10. In cells of the kidney, movement of salts is well controlled, occurring at some times and regions, but not others. What structure will allow precise control of movement of salt through the membrane in the kidney cells? specificity, where would these changes most likely occur? A) At an allosteric site B) In the center of the encyme C) In the active site D) At the non-competitive binding site A) mRNA B) Ribosome C) Enzyme D) Membrane transport protein E) Membrane receptor Consider the diagram below for Question 5 and 6. Consider the reaction below for Question 11. s, Wha syge of memibrsne tnespont is depicted in this image 11. What will happen to the reaction depicted above if phosphofructokinase is inactivated by the addition of a non- trough choanne proteln A) Less fructose-1,6 biphosphate and ADP will be produced B) Less fructose and ATP will be produced 1,6 biphosphate and ADP will be D) More fructose 4-phosphate E) Nothing, the reaction will proceed in the same way and ATP will be producedExplanation / Answer
1. Option D is correct.
Proteins are polymers of amino acids linked together by peptide bonds. Amino acids can be hydrophilic or hydrophobic.
2. Option B is correct.
To stop producing the protein of ADH, the cell stops its mRNA production.
3. Option A is correct.
Diffusion is the movement of molecules from high to low concentration.
4. Option C is correct.
To disturb the binding site of a substrate, the active site must be changed.
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