16. The energy that is released from glucose during respiration but not transferred to ATP bonds can be detected as

A. CO₂
B. AMP
C. ADP
D. heat

17. Which of the following is involved in energy production?

A. Generation of proton gradients across membranes
B. Transport of electrons on organic molecules
C. Conversion of compounds with high energy to those of low energy
D. All of the above

18. Which of the following enzyme does not take part in the TCA cycle?

A. Citrate synthase
B. Iso-citrate dehydrogenase
C. Pyruvate dehydrogenase
D. Malate dehydrogenase

19. The first intermediate in the TCA cycle is

A. succinate
B. fumarate
C. citrate
D. malate

20. Cholesterol can be synthesized de novo in

A. pancreas
B. intestine
C. liver
D. cell membrane