CARBOHYDRATE QUIZ

Which of the following is carried out when cAMP functions as a second messenger?

Activates the cAMP-dependent protein kinase

Acts second in importance to AMP

Acts outside the cell to influence cellular processes

Activates all cytosolic protein kinases

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YOUR ANSWER : ?

When living organisms are cooled below some critical body temperature, the metabolic reactions within their cells cease to function properly. This malfunction occurs because

there is insufficient molecular motion for substrates to interact

their enzymes lose the proper three-dimensional shape

enzyme active sites become permanently bound to substrates

the activation energy for the reaction is raised

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Which of the following can act as precursors for gluconeogenesis?

Alanine

Glycerol

All of these

Lactate

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Which of the following enzymes plays an important role in the Cori " cycle?

Glucose-6-phosphate dehydrogenase

Lactate dehydrogenase

Glucose isomerase

Glucokinase

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What would be the molecular formula for a polymer made by linking ten glucose molecules together by dehydration synthesis, if molecular formula for glucose is C6H,206?

C60H102O51

C60H120O60

(C6H12O6)10

C60H100O50

TRUE ANSWER : ?
YOUR ANSWER : ?

The hormones, glucagon and epinephrine, stimulate glycogen breakdown to G-6-P

directly, by binding to glycogen phosphorylase

only in the liver

indirectly, by first stimulating adenylate cyclase to make cAMP

using ATP as the phosphoryl donor

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Cellulose fibers resemble with the protein structure in the form of

β-sheets

α-helices

β-turns

None of these

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YOUR ANSWER : ?

Insulin

stimulates gluconeogenesis and inhibits glycolysis

inhibits gluconeogenesis and glycolysis

stimulates gluconeogenesis and glycolysis

inhibits gluconeogenesis and stimulates glycolysis

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Which of the following would be considered a part of metabolism?

Catabolic pathways that break down complex carbohydrates

The capture of light energy for use in making glucose

Biosynthetic pathways that build DNA

All of the above

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YOUR ANSWER : ?

Which of the following compounds is responsible for coordinated regulation of glucose and glycogen metabolism?

Acetyl-CoA

Fructose 2,6 bisphosphate

Fructose 1,6 bisphosphate

NAD+

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