31. The sugar which forms the major component of nucleic acids is

A. ribose
B. galactose
C. mannose
D. maltose

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32. Under aerobic condition pyruvate is converted by pyruvate dehydrogenase to

A. phosphoenolpyruvate
B. acetyl CoA
C. lactate
D. glyceraldehyde 3 phosphate

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33. Which of the following is not a disaccharide?

A. Amylose
B. Cellobiose
C. Lactose
D. None of these

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34. Hexokinase activity in glycolysis is inhibited by

A. glucose 6- phosphate
B. fructose 6-phosphate
C. fructose 1,6 biphosphate
D. phosphofructokinase

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35. The ultimate source of energy that sustains living systems is

A. glucose
B. oxygen
C. sunlight
D. carbon dioxide

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