26. During DNA replication, the primers used for leading and lagging strand initiation must be removed by what kind of enzymatic activity? (A) 3* to 5' exonuclease (B) 5' to 3' exonuclease (C) 3' to 5' endonuclease (D) 5' to 3' endonuclease

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.

26. During DNA replication, the primers used for leading and lagging strand initiation must be removed by what kind of enzymatic activity?
(A) 3* to 5' exonuclease
(B) 5' to 3' exonuclease
(C) 3' to 5' endonuclease
(D) 5' to 3' endonuclease

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