BC2002 sample MCQ 2

C) Acetyl-CoA

Glucose, fatty acids and most amino acids all converge in metabolism to form which ONE of the following biomolecules

A) Pyruvate

B) Glycogen

C) Acetyl-CoA

D) Hexokinase

E) Starch

A) 3000 kJ/mol

Which ONE of the following amounts in the nearest approximation to the complete oxidation of glucose in the presence of oxygen:

A) 3000 kJ/mol

B) 30 kJ/mol

C) 3 kJ/mol

D) 3000 mol

E) 10,000 kJ/mol

D) Glycolysis

Which ONE of the following pathways is responsible for the major flux of carbon in cells:

A) Citric acid cycle

B) Gluconeogenesis

C) Beta-oxidation

D) Glycolysis

E) None of the above

E) 10, cytosol

Which one of the following describes the number of enzymes that function in glycolysis and the localization of these enzymes in cells

A) 8, cytosol

B) 5, cytosol

C) 5, mitochondria

D) 10, nucleus

E) 10, cytosol

D) Pyruvate

What is the name of this biomolecule?

A) Acetyl-CoA

B) Glucose

C) Fructose-6-phosphate

D) Pyruvate

E) Glyceraldehyde-3-phosphate

A) 2 NADH and 2ATP

Which ONE of the following describes the total amount of energy obtained during glycolysis?

A) 2 NADH and 2ATP

B) 4 NADH and 2ATP

C) 2 NADH and 4ATP

D) 2 NADH and 1ATP

E) 1 ATP and 2 NADH

A) Pyruvate kinase

Which ONE of the following enzymes converts phosphoenolpyruvate to pyruvate in glycolysis?

A) Pyruvate kinase

B) Pyruvate carboxylase

C) Phosphoenolpyruvate kinase

D) Pyruvate dehydrogenase

E) None of the above

B) Phosphofructokinase-1

Which ONE of the following enzymes is the committed step in glycolysis

A) Hexokinase

B) Phosphofructokinase-1

C) Pyruvate kinase

D) Glyceraldehyde 3-phosphate dehydrogenase

E) Glucose 6-phosphatase

a) pyruvate decarboxylase

Which ONE of the following enzymes do vertebrates lack preventing them from converting pyruvate to ethanol?

A) pyruvate decarboxylase

B) pyruvate kinase

C) pyruvate dehydrogenase

D) pyruvate isomerase

E) pyruvate mutase

B) pyruvate decarboxylase and alcohol dehydrogenase

Which of the following groups of 2 enzymes convert pyruvate to ethanol

A) pyruvate carboxylase and alcohol dehydrogenase

B) pyruvate decarboxylase and alcohol dehydrogenase

C) Pyruvate kinase and lactate dehydrogenase

D) lactate dehydrogenase and pyruvate carboxylase

E) hexokinase and phosphofructokinase-1