This is a biochemistry question i need answers to 6-12 What is the purpose of fe

Question

This is a biochemistry question i need answers to 6-12

What is the purpose of fermentation of pyruvate to lactate or ethanol? to produce additional ATP to provide a precursor for lactose synthesis to regenerate NAD* for glycolysis to prevent pyruvate from entering the TCA cycle none of the above Pyruvate kinase catalyzes what reaction? conversion of phosphoenol-pyruvate to pyruvate phosphorylation of pyruvate to 3-phosphoglycerate conversion of pyruvate to acetaldehyde and CO_2 conversion of pyruvate to lactate conversion of pyruvate to acetyl-CoA What is the net energy gain in glycolysis per molecule of glucose? 2 ATP and 2 NADH 4 ATP and 2 NAOH 2 ATP and 2 NAD* 4 ATP and 2 NAD* there is no net gain Acetyl-CoA enters the TCA cycle by reacting with which of the following? citrate isocitrate oxaloacetate succinate fumarate What is the function of the last three steps of the TCA cycle? release 2 CO_2 reduce 2 NAD* to NADH generate GTP from GDP and P_1 generate ATP from ADP and P_1 regenerate oxaloacetate What is the energy yield of one turn of the TCA cycle? 1 GTP, 1 NADH, 3 FADH_2 1 GTP, 3 NADH 1 FADH_2 1 GTP, 3 NADH 1 GTP, 4 NADH, 1 FAHD_2 2 GTP, 3 FADH_2 At which step of the TCA cycle is GTP generated? conversion of citrate to isocitrate. conversion of isocitrate to a-ketogulatarate conversion of a-ketoglutarate to succinyl-CoA conversion of succinyl-CoA to succinate conversion of succinate to fumarate

Explanation / Answer

Question 6: Option C: To regenerate NAD+ for glycolysis.

Question 7: Option A: conversion of phosphoenol-pyruvate to pyruvate.

Question 8: Option B: 4 ATP and 2 NADH

Question 9: Option C: oxaloacetate.

Question 10: Option E: regenerate oxaloacetate.

Question 11: Option B: 1 GTP, 3 NADH, 1 FADH2.

Question 12: Option D: conversion of succinyl-CoA to succinate.

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