6. Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H₂S in the production of __________ .

A. ATP; methionine
B. ATP; cytosine
C. UTP; cytosine
D. GTP; cytosine

7. The chlorophyll molecules used by eucaryotes and cyanobacteria absorb radiant energy in the____________portion(s) of the visible spectrum.

A. red
B. green
C. red and blue
D. green and ultraviolet

8. In aerobic respiration, the terminal electron acceptor is

A. oxygen
B. nitrogen
C. hydrogen
D. nitrate

9. Which of the following statement is correct?

A. Phosphate repression can not be eliminated by optimization of nutrient medium, deregulated medium must be used as production strains
B. Phosphate repression can be eliminated by optimization of nutrient medium, deregulated medium must be used as production strains
C. Phosphate repression can be eliminated by optimization of nutrient medium, regulated medium must be used as production strains
D. Phosphate repression can not be eliminated by optimization of nutrient medium, regulated medium must be used as production strains

10. The acquisition of energy by glucose fermentation requires

A. substrate-level phosphorylation
B. electron transport of electrons from NADH
C. long-chain fatty acid oxidation
D. the enzyme formic-hydrogen lyase