Carbohydrate – Section 2

1. Patients suffering from Von Gierke’s disease are unable to perform gluconeogenesis because they have a defective

A. lactate dehydrogenase
B. glucose 6 phosphatase
C. pyruvate carboxylase
D. none of these

Correct Answer: B. glucose 6 phosphatase

2. The multistep pathways of metabolism are efficient because they

A. locate all of the enzymes for a pathway in the same place within the cell
B. use the same substrate for all of the enzymes in the pathway
C. use the same enzyme for all of the substrates in the pathway
D. spread the enzymes for a pathway into several different organelles

Correct Answer: A. locate all of the enzymes for a pathway in the same place within the cell

3. Metabolic reactions that break down complex molecules into smaller compounds, thereby releasing usable energy for the cell, are best described as

A. biosynthetic
B. catabolic
C. catalytic
D. photosynthetic

Correct Answer: B. catabolic

4. Fructose diphosphate accumulation would

A. inhibit glycolysis and gluconeogenesis
B. stimulate glycolysis and gluconeogenesis
C. stimulate glycolysis and inhibit gluconeogenesis
D. inhibit glycolysis and stimulate gluconeogenesis

Correct Answer: C. stimulate glycolysis and inhibit gluconeogenesis

5. Aldolases splits fructose 1,6 biphosphate into

A. glyceraldehyde 3- phosphate
B. glyceraldehyde 3- phosphate and dihydroxyacetone phosphate
C. dihydroxyacetone phosphate
D. none of the above

Correct Answer: B. glyceraldehyde 3- phosphate and dihydroxyacetone phosphate

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