TCA cycle and electron transport system, ATP yield
- The complex II of mitochondrial electron transport chain is also known as Answer: 2. Succinate dehydrogenase Key idea: Complex II of the electron transport chain is succinate dehydrogenase. It is the Krebs cycle en... 1
- Match List I with List IIList I: A. Citric acid cycle; B. Glycolysis; C. Electron transport system; D. Proton gradientList II: I. Cytoplasm; II. Mitochondrial matrix; III. Intermembrane space of mitochondria; IV. Inner mitochondrial membraneChoose th… Answer: 3. A-II, B-I, C-IV, D-III Key idea: match each process with its location in the cell. Citric acid cycle: mitochondrial matrix (II).... 1
- Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate. Answer: 4. Succinyl-CoA → Succinic acid Key idea: oxidation steps in the TCA cycle produce NADH or FADH₂ . Isocitrate to α -ketoglutarate (N... 1
- Match List I with List II :List I | List IIA. Oxidative decarboxylation | I. Citrate synthaseB. Glycolysis | II. Pyruvate dehydrogenaseC. Oxidative phosphorylation | III. Electron transport systemD. Tricarboxylic acid cycle | IV. EMP pathwayChoose th… Answer: 1. A-II, B-IV, C-III, D-I Key idea: Match the process with its enzyme or pathway. Oxidative decarboxylation: pyruvate dehydrogenase... 1
- Which of the following statements is incorrect ? Answer: 2. In ETC (Electron Transport Chain), one molecule of NADH+H ^+ gives rise to 2 ATP molecules, and one FADH ₂ gives rise to 3 ATP mo... 1
- The number of substrate level phosphorylations in one turn of citric acid cycle is : Answer: 2. One In one turn of the citric acid cycle, one substrate level phosphorylation occurs: succinyl-CoA to succinate, forming GTP (whi... 1
- Which of these statements is incorrect ? Answer: 4. Oxidative phosphorylation takes place in outer mitochondrial membrane. Key idea: Check where each respiratory step occurs. TCA cy... 1
- Which statement is wrong for Krebs' cycle ? Answer: 3. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid The wrong statement is opt... 1
- Oxidative phosphorylation is Answer: 3. formation of ATP by energy released from electrons removed during substrate oxidation Oxidative phosphorylation is the formation... 1