Question

1. The classical point of view is that, during mitochondrial respiration, three ATP molecules can be generated from one molecule of NADH + H⁺ and only two from FADH₂. When factoring in the cytosolic NADH + H⁺, the maximum number of molecules of ATP per glucose generated by the electron transport system is _____.

   	A.	2
   	B.	4
   	C.	36
   	D.	38 47

47.

1. The advantage to the cell of the gradual oxidation of glucose during cellular respiration compared with its combustion to CO₂ and H₂O in a single step is:

   	A.	energy can be extracted in usable amounts.
   	B.	more free energy is released for a given amount of glucose oxidized.
   	C.	no energy is lost as heat.
   	D.	more CO2 is produced for a given amount of glucose oxidized.

48.

1. What purpose does the phosphorylation of glucose to glucose 6-phosphate by the enzyme hexokinase serve as the first step in glycolysis?

   		It helps drive the uptake of glucose from outside the cell.
   		It generates a high-energy phosphate bond.
   		It converts ATP to a more useful form.
   		It enables the glucose 6-phosphate to be recognized by phosphofructokinase, the next enzyme in the glycolytic pathway.

49.

The products of the tricarboxylic acid cycle are:

	A.	carbon dioxide, GTP, NADH + H+, and FADH2
	B.	carbon dioxide, ADP, Acetyl-S-CoA and FAD
	C.	oxygen, ATP, NAD+, and FAD
	D.	oxygen, ATP, NADH, and FADH2

Answer 1

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