16. Which of the followings serves as the first primer in RT-PCR for eukaryotic RNA? (A) Oligo A (B) Oligo G (C) Oligo T (D) Oligo C

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.