20. Double stranded DNA molecules can be cleaved at specific recognition sites by (A) RNA polymerase.(B) DNA ligase. (C) DNA polymerase. (D) gyrase. (E) restriction endonucleases.

10. Which of the following statements concerning the B oxidation of fatty acids is true? (A) About 1,200 ATP molecules are ultimately produced per 20-carbon fatty acid oxidized. (B) One FADH2 and two NADH are produced for each acetyl-CoA. (C) The free fatty acid must be carboxylated in the B position by a biotin-dependent reaction before the process of 8 oxidation commences. (D) The free fatty acid must be converted to a thioester before the process of B oxidation commences, (E) Two NADH are produced for each acetyl-CoA.

20. Double stranded DNA molecules can be cleaved at specific recognition sites by
(A) RNA polymerase.
(B) DNA ligase.
(C) DNA polymerase.
(D) gyrase.
(E) restriction endonucleases.

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