Chapter 16 Review

What class of enzymes catalyzes the reaction of transferring a phosphoryl group from ATP to acceptor?

• kinases

• phosphatases

• phosphorylases

• hydrolases

• amylases

What is the result of the reaction sequence of glycolysis, where glucose undergoes a phosphorylation, an isomerization, and a second phosphorylation?

• formation of glucose 6-phosphate

• formation of fructose 6-phosphate

• formation of fructose 1,6-bisphosphate

• isomerization of glucose 6-phosphate to fructose 6-phosphate

• isomerization of fructose 6-phosphate to glucose 6-phosphate

What reaction does glyceraldehyde 3-phosphate dehydrogenase catalzye?

• conversion of glyceraldehyde 3-phosphate into 1,3-bisphosphoglycerate

• conversion of glucose 6-phosphate into fructose 6-phosphate

• conversion of 1,3-bisphosphoglycerate into 3-phosphoglycerate

• conversion of fructose 6-phosphate into glucose 6-phosphate

• conversion of 1,3-bisphosphoglycerate into dihydroxyacetone phosphate

What are the components of glyceraldehyde 3-phosphate dehydrogenase's active site?

• reactive histidine residue and NADH with cysteine

• reactive cysteine residue and NADH with histidine

• reactive histidine residue and NAD+ with cysteine

• reactive cysteine residue and NAD+ with histidine

• reactive cysteine residue and ATP with histidine

What organ is the main site of fructose metabolism?

• pancreas

• salivary gland

• liver

• kidneys

What molecule inhibits hexokinase activity?

• glucose

• fructose 6-phosphate

• glucose 6-phosphate

• fructose 1,6-bisphosphate

• fructose 2,6-bisphosphate

The concentration of which molecule increases when phosphofructokinase is inactive?

• glucose

• fructose

• glucose 6-phosphate

• fructose 1,6-bisphosphate

• fructose 2,6-bisphosphate

What organ is the site of gluconeogenesis?

• brain

• kidneys

• pancreas

• muscles

• spleen

External NAD+ derives from:

• pyruvate

• ATP

• niacin

• thiamine

• lactate

overconsumption of which monosaccharide may lead to obesity, fatty liver, and insulin insensitivity?

• lactose

• glucose

• galactose

• fructose

• sucrose