1. Which of the following functions describes the enzyme Peptidase?* A. removal of H2O B. remove phosphate from a substrate C. cleave phosphodiester bond D. cleave amino bonds 2. In the final step of glycolysis, identify the name of the enzyme that converts phosphoenolpyruvate into pyruvate* A. hexokinase B. pyruvate kinase C. aldolase D. Phosphofructokinase-1
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- BIOMOLECULES - Please answer the questions properly. - Multiple choice 1. Which of the following is the coenzyme of riboflavin (B2)? A. FAD and FMN B. NAD or NADP C. Coenzyme A D. Thiamine pyrophosphate 2. The lysosome is the “stomach” of the cell. What is main type of enzyme found in lysosomes? A. Oxidases B. kinases C. isomerases D. hydrolasesBIOMOLECULES - Please answer the questions properly. - Multiple choice 1. Supposed you want to use phosphoglucomutase to breakdown glycogen. You found out that this enzyme is responsible for converting glucose 1-phosphate (C6H13O9P) to glucose-6-phosphate (C6H13O9P). Based on this action, to which enzyme class does phosphoglucomutase belong? A. Ligase B. Isomerase C. Oxidoreductase D. Lyase 2. Enzymes can be regulated in a many different ways. Covalent modification is one way. Here, the functional groups are attached to or removed from the enzyme. A phosphate group is an example of a functional group that can be added to an enzyme. Depending on the enzyme, addition of a phosphate group can either increase or decrease an enzyme's activity. Evaluate the following names and identify the general name of an enzyme that functions to add phosphate groups to its substrate? A. ligase B. isomerase C. phosphatase D. kinaseBIOMOLECULES - Please answer the questions properly. - Multiple choice 1. Enzymes have known attributes and functions. Which of the following is NOT its common attribute or function? A. enzymes are specific B. enzymes may be used many times for a specific reaction C. enzymes provide activation energy for reactions D. enzyme activity can be regulated 2. Evaluate the following statements and identify the best that can describe how a lysozyme works.? A. It cuts the bond in a polysaccharide, by holding six sugars in a row in its active site, and adding a water molecule, causing hydrolysis. B. It is responsible for the cleaving of amino acid chains via the ping-pong mechanism. C. It cleaves the phosphodiester bond in nucleic acids, via hydrolysis. D. It hydrolyzes bonds in lipids, causing a split in a fatty acid chain.
- BIOMOLECULES - Please answer the questions properly. - Multiple choice 1. Enzymes have known attributes and functions. Which of the following is NOT its common attribute or function? A. enzymes are specific B. enzymes may be used many times for a specific reaction C. enzymes provide activation energy for reactions D. enzyme activity can be regulated 2. Evaluate the following statements and identify the best that can describe how a lysozyme works.? A. It cuts the bond in a polysaccharide, by holding six sugars in a row in its active site, and adding a water molecule, causing hydrolysis. B. It is responsible for the cleaving of amino acid chains via the ping-pong mechanism. C. It cleaves the phosphodiester bond in nucleic acids, via hydrolysis. D. It hydrolyzes bonds in lipids, causing a split in a fatty acid chain.PART II: Short Answer 21. Explain what it means for an active site to have electronic and shape complementary. Give hypothetical examples of each. A researcher is studying three different synthetic collagens. Collagen A is made of (Pro-Gly- Hyp)10, Collagen B is made of (Pro-Gly-Flp)10, and Collagen C is made of (Pro-Gly-Thr)io. Based on the collagen studies we did in class, which one (A, B, or C) B a) b) ( is the most like normal collagen - would be the most stable and why - because it contain fluorine which is very electronegative would be the least stable and why- c is the least stableMULTIPLE CHOICE - Please answer properly QUESTION : Which of the following functions describes the enzyme Peptidase? A. remove phosphate from a substrate B. removal of H2O C. cleave phosphodiester bond D. cleave amino bonds
- BIOMOLECULES - Please answer the questions properly. - Multiple choice 1. Which of the following choices is correct about the active site of an enzyme? A. contains amino acids without sidechains B. remains rigid and does not change shape C. is found at the center of globular enzymes D. none of the above choices is correct 2. The induced fit model describes one method where an enzyme’s active site can accept some specific substrate. Which of the following explains the “induced fit” model regarding enzyme-substrate binding? A. upon binding to the enzyme, the substrate already fits perfectly into the active site B. upon binding to the enzyme, the substrate changes its own shape so that it fits perfectly C. upon binding to the enzyme, the substrate changes the shape of the enzyme so that it fits perfectly D. all of these are examples of induced fitBIOMOLECULES - Please answer the questions properly. - Multiple choice Allopurinol is an inhibitor of xanthine oxidase. Administration of allopurinol to a patient with gout and normal HG-PRT levels would be expected to lead to all of the following EXCEPT: A. decreased de novo synthesis of IMP B. increased xanthine in the blood C. increased levels of PRPP D. decreased urate in the urine 2. Which of the following unique attributes creates a steroid? A. 1 carboxyl group B. 4-fused carbon rings C. 2-fused oxygen molecules D. 3-fused hydrogen chainsO IgG. O IgM. O IgA. O IgD. O IgE. QUESTION 97 Vancomycin O interferes with the action of the lipid carrier that transports peptidoglycan precursors across the plasma membrane. O inhibits the transpeptidation reaction in peptidoglycan biosynthesis. O blocks the addition of the pentapeptide chain during peptidoglycan biosynthesis. O inhibits the transglycosylase reaction in peptidoglycan biosynthesis. QUESTION 98 Ergot and aflatoxin are toxins sometimes found in grains contaminated with fungi. O True O False
- BIOMOLECULES - Please answer the questions properly. - Multiple choice Qyestion 1 : If a cell has an adequate supply of adenine nucleotides but requires more guanine nucleotides for protein synthesis: 1. Glutamine-PRPP amidotransferase will not be fully inhibited. 2. AMP will be a feedback inhibitor of the condensation of IMP with aspartate. 3. ATP will stimulate the production of GMP from IMP. 4. ATP will inhibit nucleoside diphosphate reductase. A. 1, 2, and 3 B. 2 and 4 C. 1, 2, 3, and 4 D. 1 and 3MULTIPLE CHOICE - Please answer properly QUESTION : Supposed you want to use phosphoglucomutase to breakdown glycogen. You found out that this enzyme is responsible for converting glucose l-phosphate (C6H1309P) to glucose-6-phosphate (C6H1309P). Based on this action, to which enzyme class does phosphoglucomutase belong? A. Isomerase B. Oxidoreductase C. Lyase D. LigaseBIOMOLECULES - Please answer the questions properly. - Multiple choice 1. Which of the following statements is TRUE in the catabolism of cytidine triphosphate (CTP)? A. the nitrogen-containing ring will be oxidized B. nitrogen will be released in the form of ammonia (ammonium ion) C. the final product will have the same type of nitrogen-containing ring as CTP D. hypoxanthine will be an intermediate 1. A 7-year-old boy suffers from mental retardation and self-mutilation and has an increased levels of serum uric acid. These symptoms are characteristic of Lesch Nyhan syndrome, which is due to defective ________? A. Xanthine oxidase B. Denovo synthesis of pyrimidines C. HGPRT (Hypoxanthine Guanine Phospho Ribosyl Transferase) D. Salvage pathway for pyrimidine biosynthesis