Carbohydrate Metabolism Quiz
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Which enzyme catalyzes the cleavage of fructose 1,6-bisphosphate into two triose phosphates?
A. Aldolase
B. Phosphoglycerokinase
C. Triosephosphate isomerase
D. Phosphoglyceromutase
Under aerobic conditions, pyruvate is oxidized to which molecule?
A. Acetyl CoA
B. Lactate
C. Ethanol
D. Glucose
What is the net result of the isomerization of glucose 6-phosphate to fructose 6-phosphate?
A. Formation of glyceraldehyde 3-phosphate
B. Formation of dihydroxyacetone phosphate
C. Formation of 1,3-bisphosphoglycerate
D. Formation of 2-phosphoglycerate
Which enzyme catalyzes the phosphorylation of glucose to yield glucose 6-phosphate?
A. Hexokinase
B. Phosphoglucoisomerase
C. Phosphofructokinase
D. Glyceraldehyde 3-phosphate dehydrogenase
How many ATP molecules are produced for the complete oxidation of one molecule of glucose?
A. 26 ATP
B. 28 ATP
C. 30 ATP
D. 32 ATP
What is the purpose of glycogenolysis?
A. To synthesize glycogen from glucose
B. To convert glucose 6-phosphate to glycogen
C. To convert glycogen to glucose 6-phosphate
D. To convert glucose to glycogen
Which step of glycolysis involves the production of ATP through substrate-level phosphorylation?
A. Step 1: Phosphorylation Using ATP
B. Step 3: Phosphorylation Using ATP
C. Step 7: Phosphorylation of ADP
D. Step 10: Phosphorylation of ADP
What is the net gain of ATP molecules for every glucose molecule converted into two pyruvates?
A. 1 ATP
B. 2 ATP
C. 3 ATP
D. 4 ATP
What is the final step in carbohydrate digestion?
A. Conversion of disaccharides to monosaccharides
B. Formation of glucose 6-phosphate
C. Isomerization of glucose 6-phosphate to fructose 6-phosphate
D. Phosphorylation of ADP to form 3-phosphoglycerate
What is the primary site for carbohydrate digestion?
A. Mouth
B. Stomach
C. Small Intestine
D. Liver
Which steps of glycolysis involve the production of ATP?
A. Steps 1, 3, 7, and 10
B. Steps 2, 4, 6, and 8
C. Steps 5 and 9
D. Steps 11 and 12
Which enzyme is involved in the conversion of glucose to glucose 6-phosphate in glycolysis?
A. Hexokinase
B. Phosphofructokinase
C. Pyruvate kinase
D. Phosphoglucomutase
What is the final product of glycolysis?
A. Glucose
B. Pyruvate
C. Lactic Acid
D. Acetyl-CoA
Which stage of glycolysis is an energy-consuming stage?
A. Six-carbon stage
B. Three-carbon stage
C. Both stages
D. Neither stage
What is the purpose of lactate fermentation?
A. To produce ATP
B. To convert NADH to NAD+
C. To convert pyruvate to lactate
D. To convert glucose to lactate
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