20. During the expression process of a protein from its gene, what is the role of the promoter sequence? (A) Initiation of RNA transcription (B) Initiation of protein translation (C) Initiation of protein modification (D) Initiation of RNA degradation

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.

20. During the expression process of a protein from its gene, what is the role of the promoter sequence?
(A) Initiation of RNA transcription
(B) Initiation of protein translation
(C) Initiation of protein modification
(D) Initiation of RNA degradation

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