22. Restriction enzymes are endonuclease that can recognize and digest (A) single-stranded RNA (B) single-stranded DNA (C) double-stranded RNA (D) double-stranded DNA

5. Which of the following statements is INCORRECT for retroviruses? (A) They are enveloped RNA virus. (B) They encode reverse transcriptase and replicate through a DNA intermediate. (C) Some of them produce tumors in the infected animals. (D) Retroviruses include human immunodeficiency virus (HIV) which primarily infects CD8 T cells.

22. Restriction enzymes are endonuclease that can recognize and digest
(A) single-stranded RNA
(B) single-stranded DNA
(C) double-stranded RNA
(D) double-stranded DNA

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