Cell Biology Questions and Answers – Aerobic Respiration – Adenosine Triphosphate

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This set of Cell Biology Multiple Choice Questions & Answers (MCQs) focuses on “Aerobic Respiration – Adenosine Triphosphate”.

1. 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.
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2. 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. 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. 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.
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5. 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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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn