One of the enzymes in glycolysis is aldolase, which requires Zn2+ for catalysis. Under conditions of Zn deficiency, when the enzyme lacks zinc, would be referred to as: O Coenzyme O Prosthetic group O Holoenzyme O Apoenzyme
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- One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditions of zinc deficiency and the enzyme lacks zinc, it would be referred to as the: a. apoenzyme. b. coenzyme. c. holoenzyme. d. prosthetic group. e. substrate.An enzyme requiring an inorganic cofactor (like Fe2+), which is only loosely attached to the apoenzyme, is properly referred to as: the metalloenzyme the metal-activated enzyme the cosubstrate the prosthetic group the coenzymeAn organic cofactor (usually derived from a vitamin or a nucleotide), which is tightly attached to the enzyme (like FAD when used by the Krebs cycle enzyme succinate dehydrogenase), is always called: the metalloenzyme the metal-activated enzyme the holoenzyme the prosthetic group the cosubstrate
- Which of the following is an endoenzyme? A) amylase B) Desulfhydrase C) none are endoenzymes D) all are endoenzymes E) GelatinaseWhich of the following is a cofactor and which is a coenzyme?(a) Cu2+ (b) Tetrahydrofolate(c) NAD+ (d) Mg2+Which of the following statements are true? For each, explain why or why not. (a) All coenzymes are electrontransfer agents. (b) Coenzymes do not contain phosphorus or sulfur. (c) Generating ATP is a way of storing energy.
- Similar to vitamins: c. coenzyme b. cofactor a. apoenzyme d. all of the abovewhich of the following glycolytic reactions is an oxidation? a) G3P to 1,3-BPG b) PEP to Pyr c) lactic acid fermentation under anaerobic conditions d) condensation of acetate with OAA e) succinate decarboxylase reactionWhich of the following coenzymes accepts electrons that was removed in the succinate of the Krebs Cycle? A. ADP B. FAD C. GDP D. NAD+
- Which of the following statements about folic acid is not true? a. Folic acid is activated by folate synthase. b. Folic acid structure contains a pteridine ring and para-amino benzoic acid. c. NADPH is required in the reactions activating folic acid. d. Tetrahydrofolate is the biologically active derivative of folic acid.Which of the following statements is TRUE in describing the activity of the lactaseenzyme? A. Lactase is converted to glucoseB. One lactase enzyme can catalyze many reactions C. The shape of lactase does not change during the reaction D. Lactase can function effectively at many different pH levelsWhich of the following doesn’t occur in the transition reaction? Pyruvic acid is oxidized Pyruvic acid is decarboxylated Pyruvic acid is reduced Acetic acid attaches to coenzyme A to form Acetyl CoA