Citric Acid Cycle Practice Questions PDF

Potential Quiz Questions Citric Acid Cycle Recommended Reading Ch 13 1. During aerobic respiration, what happens to the pyruvate from glycolysis? Where does this reaction occur? 2. What enzyme complex is used to convert pyruvate? What are the products of pyruvate decarboxylation? 3. What process oxi...

Potential Quiz Questions Citric Acid Cycle Recommended Reading Ch 13 1. During aerobic respiration, what happens to the pyruvate from glycolysis? Where does this reaction occur? 2. What enzyme complex is used to convert pyruvate? What are the products of pyruvate decarboxylation? 3. What process oxidizes acetyl CoA and where does it occur? 4. What molecule does acetyl CoA bind to when it enters the citric acid cycle? What molecule is formed? 5. How many reactions occur in the citric acid cycle? What products are made by the citric acid cycle? 6. What molecule must be re-generated for the citric acid cycle to continue? 1. During aerobic respiration, pyruvate from glycolysis undergoes conversion into acetyl CoA through oxidative decarboxylation. This reaction occurs in the mitochondrial matrix. 2. The enzyme complex used to convert pyruvate is the pyruvate dehydrogenase complex. The products of pyruvate decarboxylation are one molecule of acetyl CoA, one molecule of NADH, and one molecule of CO2. 3. The process that oxidizes acetyl CoA is the citric acid cycle (also known as the Krebs cycle or tricarboxylic acid cycle). It occurs in the mitochondrial matrix. 4. Acetyl CoA binds to oxaloacetate when it enters the citric acid cycle, forming citrate. 5. Eight reactions occur in the citric acid cycle. The products of the citric acid cycle per one round of the cycle include three molecules of NADH, one molecule of FADH2, one molecule of ATP (or GTP), and two molecules of CO2. 6. Oxaloacetate must be regenerated for the citric acid cycle to continue. It combines with acetyl CoA to form citrate, thus completing the cycle.