45. Which of the following scientists is NOT associated with the discovery of the double-helix model of DNA? (A) James Watson (B) Kary Mullis (C) Francis Crick (D) Rosalind Franklin

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.

45. Which of the following scientists is NOT associated with the discovery of the double-helix model of DNA?
(A) James Watson
(B) Kary Mullis
(C) Francis Crick
(D) Rosalind Franklin

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