Bioenergetics| NTS Sindh Mdcat Past Paper MCQs | mosaicbro.com

Bioenergetics| NTS Sindh Mdcat Past Paper MCQs

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15 RuBP + O₂ → Rubisco → PGA + ______.
Correct Answer: B
Explanation: Rubisco oxygenase activity produces phosphoglycolate (photorespiration).
16 Three word equations are shown: P. Carbon dioxide + water → glucose + oxygen Q. Glucose + oxygen → carbon dioxide + water R. Glucose → alcohol + carbon dioxide What is/are the equation(s) for anaerobic respiration in yeast?
Correct Answer: C
Explanation: Equation R represents alcoholic fermentation (anaerobic respiration in yeast).
17 In the Krebs cycle, substrate-level phosphorylation accompanies the formation of:
Correct Answer: C
Explanation: Succinyl-CoA → Succinate generates GTP (substrate-level phosphorylation).
18 The light-dependent reaction of photosynthesis occurs in:
Correct Answer: C
Explanation: Light reactions occur in thylakoid membranes (site of photosystems).
19 The end product of glycolysis:
Correct Answer: B
Explanation: Glycolysis ends with pyruvate formation.
20 The main process that occurs in the dark reaction in photosynthesis is:
Correct Answer: D
Explanation: Calvin cycle fixes CO₂ into organic molecules (carbon fixation).
21 In paper chromatography, xanthophyll will give ______ color:
Correct Answer: C
Explanation: Xanthophyll appears yellow on chromatography paper.
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