97. In the TCA cycle, carbon enters the cycle asand exits s with metabolic energ
ID: 280329 • Letter: 9
Question
97. In the TCA cycle, carbon enters the cycle asand exits s with metabolic energy captured as a. malonyl-CoA; water, NADH: [FADH? ATP b. acetyl-CoA: CO2: NADH: ATP: NADPH c. succinyl-CoA; CO2: ATP: NADH; NADPH d. malonate; water, NADH; ATP: NADPH e. acetyl-CoA; CO2; ATP: NADH: [FADH2] 98. Glucokinase has a Km value of 10.0 mM, whereas hexokinase has a Km value of 0.1 mM. This is consi which of the following? a. glucokinase acts on glucose at low concentrations. b. glucokinase acts on glucose only at high glucose concentrations. c. hexokinase acts at about half-maximal velocity at glucose concentrations of 4-5 mM. d. hexokinase acts on glucose only at high levels of glucose. e. glucokinase phosphorylates most of the glucose at low glucose levels. 99. What is a characteristic difference between FAD and NAD? a NAD transfers two electrons while FAD can transfer one or two. b. NAD is re-oxidized easily by molecular oxygen while FAD is not. e. NAD binds tightly to its enzyme while FAD only binds loosely. d. Only FAD participates in oxidation-reduction reactions. e. NAD is a stronger oxidizing agent than FAD. 100. Which statement about RedOx reactions is incorrect? a. what is oxidized is the reducing agent and what is reduced is the oxidizing agent b. The species that donates electrons is called the oxidizing agent c. The oxidizing agent accepts electrons it causes the oxidation of another species d. The ion or molecule that accepts electrons is called the oxidizing agent e. The species that receives the electrons is called the oxidizing agent 101. All of the following are a coenzyme or a precursor of a coenzyme EXCEPT a. biotin. b. riboflavin. c. retinol d. niacin e. thiaminExplanation / Answer
Answer:
97) In the TCA cycle, carbon enters the cycle as acetyl-CoA and exits as CO2 with metabolic energy captured as ATP, NADH and [FADH2].
98) Glucokinase has a Km value of 10.0 mM, whereas hexokinase has a Km value of 0.1 mM. This is consistent with which of the following:
99) What is a characteristic difference between FAD and NAD+?
100) Which statement about RedOx reactions is incorrect?
101) All of the following are a conenzyme or a precursor of a coenzyme EXCEPT:
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