Engineering Questions with Answers - Multiple Choice Questions

MCQs on Aerobic Respiration – Adenosine Triphosphate

1 - Question

Mitochondria are not able to transport NADH from cytosol.
a) True
b) False

View Answer

Answer: a
Explanation: The reduced coenzymes FADH2 and NADH are produced during the TCA cycle. Mitochondria are not able to import the NADH from cytosol and there are two mechanisms that allow electrons to reach mitochondrial electron transport chain and be used for ATP production.




2 - Question

. How many molecules of ATP are formed from the catabolism of one glucose molecule?
a) 12
b) 24
c) 36
d) 48

View Answer

Answer: c
Explanation: By complete catabolism of one molecule of glucose by glycolysis and TCA cycle, 36 molecules of adenosine triphosphate (ATP) are formed.




3 - Question

TCA cycle is a __________ process and glycolysis is a ______________ process.
a) aerobic, anaerobic
b) anaerobic, aerobic
c) aerobic, aerobic
d) oxidation, reduction

View Answer

Answer: a
Explanation: Tricarboxylic acid (TCA) cycle is an aerobic oxidative metabolism whereas glycolysis is anaerobic oxidative metabolism.




4 - Question

Ionic gradient in which part of the mitochondrion drives the synthesis of ATP?
a) matrix
b) outer membrane
c) inner membrane
d) DNA

View Answer

Answer: c
Explanation: The inner membrane of mitochondrion maintains an ionic gradient across its inner membrane to drive energy requiring activities mainly ATP synthesis.




5 - Question

Oxidative phosphorylation and substrate-level phosphorylation are two different processes of ATP synthesis.
a) True
b) False

View Answer

Answer: a
Explanation: Oxidative phosphorylation is a process where the energy released by electrons removed during substrate oxidation drives the formation of ATP. Substrate-level phosphorylation involves the transfer of phosphate group from substrate to ADP, leading to generation of ATP.

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