Homework Answers
Option D is the correct answer. Angiotensin converting enzyme (ACE) is released from human spermatozoa during capacitation.
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Which of the following enzymes is important for inducing the acrosomal reaction? a. hyaluronidase b. acrosin...
If glucose levels in the blood were low, which of the following enzymes would be active?...
If glucose levels in the blood were low, which of the following enzymes would be active? a. none of these b. Carnitine-Acyl transferase I c. Glycogen synthase d. Acetyl CoA carboxylase
Which of the following statements about enzymes is true? a. Enzymes can make a nonspontaneous reaction...
Which of the following statements about enzymes is true? a. Enzymes can make a nonspontaneous reaction spontaneous. b. As more substrate is added, the reaction will continue to occur faster and faster. c. An enzyme can couple a nonspontaneous reaction to a spontaneous reaction so that anabolic processes will occur. d. Catabolic reactions are spontaneous and do not require enzymes to occur in the cell.
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B)...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
Choose the correct order of events in sea urchin fertilization. Select one: ОО a. Acrosomal reaction;...
Choose the correct order of events in sea urchin fertilization. Select one: ОО a. Acrosomal reaction; slow block to polyspermy; fast block to polyspermy b. Fast block to polyspermy; acrosomal reaction; slow block to polyspermy c. Acrosomal reaction; formation of the acrosomal process; fusion of egg and sperm plasma membranes; formation of the fertilization cone d. Formation of the acrosomal process; acrosomal reaction; fast block to polyspermy e. Acrosomal reaction; sperm organelles enter egg cytoplasm; fusion of egg and sperm...
Question 2 Which statement is not true of the acrosome reaction in human ZP induces acrosomal...
Question 2 Which statement is not true of the acrosome reaction in human ZP induces acrosomal reaction. A part of the sperm cell membrane is disintegrated and is lost. The sperm cell membrane in the post-acrosome reaction is structurally altered. • The content of the acrosome are expelled inwardly. The acrosome enzymes helps the sperm cells to penetrate the zona pellucida.
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. a...
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. acetyl-SCoA carboxylase c. propionyl-SCoA carboxylase d. PEP carboxykinase The source of acetyl-SCoA in the cytoplasm is: a carnitine b. oxaloacetate citrate d pyruvate e. lactate 10.
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. acetyl-SCoA carboxylase c. propionyl-SCoA carboxylase d. PEP carboxykinase The source of acetyl-SCoA in the cytoplasm is: a carnitine b. oxaloacetate...
32. Which of the following lipids contain a carbohydrate as part of it's structure: A. Cerebroside...
32. Which of the following lipids contain a carbohydrate as part of it's structure: A. Cerebroside B. Ganglioside C. Ceramide D. All of the above E. A and B only 33. Which of the following is a ketone body? A. Succinate B. B-hydroxyacetate C. Acetoacetate D. Acetyl CoA E. Alpha-Ketoglutarate 35. Which of the following is true about the regulation of fatty acid oxidation? A. Acetyl CoA inhibits thiolase B. Increased consumption of glucose increases fatty acid oxidation C. Carnitine...
11. Bacteria can produce approximately _____________ different enzymes A. 250 B. 2,500 C. 25,000 D. 250,000...
11. Bacteria can produce approximately _____________ different enzymes A. 250 B. 2,500 C. 25,000 D. 250,000 12. The first enzyme to be purified was A. an oxidoreductase B. a transferase C. a hydrolase D. a ligase 13. The scientist known for this first purification of an enzyme was A. Pasteur B. Sumner C. Lehninger D. Koshland 14. The initial step in enzyme catalysis requires A. a redistribution of electrons B. a transfer of protons C. recognition of substrate by the...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....
Which of the following stages is essential for enzyme catalyzed reaction to occur? A. Enzyme-substrate binding stage B. Substrate transitional stage C. Enzyme-product releasing stage D. A and C E. A,B...
Which of the following stages is essential for enzyme catalyzed reaction to occur? A. Enzyme-substrate binding stage B. Substrate transitional stage C. Enzyme-product releasing stage D. A and C E. A,B and C In terms of source for activation energy, which of the followings is possible? A. releasing of solvent molecules or atoms from enzymes B. releasing of substrates or products from enzymes C. locally or globally reversible changes in enzyme structure D. All above E. None above
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
Choose the correct order of events in sea urchin fertilization. Select one: ОО a. Acrosomal reaction; slow block to polyspermy; fast block to polyspermy b. Fast block to polyspermy; acrosomal reaction; slow block to polyspermy c. Acrosomal reaction; formation of the acrosomal process; fusion of egg and sperm plasma membranes; formation of the fertilization cone d. Formation of the acrosomal process; acrosomal reaction; fast block to polyspermy e. Acrosomal reaction; sperm organelles enter egg cytoplasm; fusion of egg and sperm...
Question 2 Which statement is not true of the acrosome reaction in human ZP induces acrosomal reaction. A part of the sperm cell membrane is disintegrated and is lost. The sperm cell membrane in the post-acrosome reaction is structurally altered. • The content of the acrosome are expelled inwardly. The acrosome enzymes helps the sperm cells to penetrate the zona pellucida.
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. acetyl-SCoA carboxylase c. propionyl-SCoA carboxylase d. PEP carboxykinase The source of acetyl-SCoA in the cytoplasm is: a carnitine b. oxaloacetate citrate d pyruvate e. lactate 10.
9. Which of the listed enzymes does not require biotin as coenzyme ?: a pyruvate carboxylase b. acetyl-SCoA carboxylase c. propionyl-SCoA carboxylase d. PEP carboxykinase The source of acetyl-SCoA in the cytoplasm is: a carnitine b. oxaloacetate...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....
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Question 501 pts
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