Question

How many NADH molecules are generated by the complete breakdown of one molecule of glucose through glycolysis, Reaction zero (Pyruvate dehydrogenase complex) and the Kreb's cycle?	a) 5 b) 8 c)10 d)12
Which of the following is not a main direct input or output of the TCA cycle?	a) CO2 b) GTP c) FADH2/QH2 d) ATP
Which enzyme is NOT used in gluconeogenesis?	a) GAP dehydrogenase b) pyruvate kinase c) aldolase d) fructose bisphosphatase
Which molecule would most effectively promote gluconeogenesis?	a) insulin b) glucagon c) fructose-2,6-bisphosphate d) glucose
If molecule A is spontaneously passing electrons to molecule B, it is likely that molecule B has a lower reduction potention (in volts) than molecule A.	a) True b) False

Answer 1

Please find the answers below:

Answer 1: Choice c (one glucose metabolizes to generate 2 molecules of NADH in glycolysis, 2 via metabolism of two molecules of pyruvate by pyruvate dehydrogenase and finally 6 molecules via the Kreb's cycle per 2 molecules of acetyl coenzyme A)

Answer 2: Choice b (GTP is not a part of the Kreb's cycle, direct or indirect)

Answer 3: Choice a (the enzyme GAP or GTPase activation protein is a part of G-protein signalling, not metabolism or gluconeogenesis)

Answer 4: Choice b (Insulin lowers the blood sugar concentration by promoting glycogenesis. However, glucagon acts reverse in nature and promotes release of glucose from liver by glycogenolysis and gluconeogenesis to maintain homeostasis)

Answer 5: False (Electrons move from a moleucule wiht high electronegativity i.e. low reduction potential or negative reduction potential to a molecule of low electronegativity i.e. high reduction potential or positive reduction potential)