answer 4 multiple choose question + one short question in biochemistry

1) In general, catabolic redox reactions use_______________ OR_________________ as a cofactor and anabolic redox reactions use______________ OR___________________ .

2)The enzyme Pyruvate Carboxylase is said to be anaplerotic because:

It replenishes the pool of oxaloacetate needed for the citric acid cycle

Plerotikos is the Greek word for Pyruvate

It prevents the accumulation of AcCoA in the cell

It carboxylates pyruvate without consuming ATP

It removes CO2 from the cell

3) The overall reaction of Glycolysis (Glucose -> 2 Pyruvate) results in the NET production per glucose molecule of:

2 molecules of NADH and 2 molecules of ATP

2 kjoules of ATP and 2 kjoules of NADH

4 molecules of ATP and 2 molecules of NADH

4 molecules of ATP

2 molecules of ATP and 2 molecules of CO2

4) Which of the following is an intermediate in Glycolysis, Gluconeogenesis and the Pentose pathway:

Oxaloacetate (OAA)

2,3 Bisphosphoglycerate

Glyceraldehyde-3-Phosphate (GAP)

Dihydroxyacetone Phosphate (DHAP)

Sedoheptulose-7-Phosophate

5) In the step of the aldolase mechanism shown below (Fig 15-5, p 486 of Voet & Voet text; step #4), as the reaction proceeds from the Enamine intermediate (lower diagram) to the Enzyme product bound as a Schiff base (upper diagram), the carboxylic acid is acting as: the fig is attached

A hydrogen acceptor

	An Acid
	A Base

An electron acceptor

An innocent bystander