1. Fatty acid biosynthesis releases what molecules at each cycle of addition a.

Question

1. Fatty acid biosynthesis releases what molecules at each cycle of addition

a. acetate

b. acetyl coa

c. co2

d. h20

e. co2 and h20

2. Whcich subunit of F1F0ATP synthase forms atp from adp and pi

a. alpha

b. beta

c. gamma

d. a

e. c

3. Photosystem I has what role in photosynthesis?

a. transfer of electon to ferrodoxin to generate nadph

b. oxidation of h20 to O2

c. pumping protons across the chloroplast membrane

d. synthesis of atp from adp and pi

e. synthesis of chlorophyll

4. Removal of the alpha amino group from alanine produces what glycolytic intermediate?

a. 3 phosphoglyceraldehyde

b. 1 fructose- 1, 6 biphosphate

c. glucose

d. phosphoenolpyruvate

e. pyruvate

Explanation / Answer

1. Answer: c

The input to fatty acid synthesis is acetyl-CoA, which is carboxylated to malonyl-CoA. The ATP-dependent carboxylation provides energy input. The CO2 is lost during condensation with the growing fatty acid.

2. Answer: c

The beta unit of F1 has three subunits with a catalytic role. They have different satges of catalytic cycle which binds to ADP and Pi and releases ATP.

3. Answer: a

Photosystem 1 transfers electrons to ferredoxin and generates NADPH. Whereas PS II participates in only non cyclic photophosphorylation and generates ATP and hydrolysis of water.

4. Answer: e

Alanine reacts with -ketoglutarate is to form glumate and pyruvate. In many aminotransferase reactions, -ketoglutarate is the amino group acceptor. In this reaction alpha amino group is released.

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