DNA replication always proceeds from the ________ of the incoming nucleotide to the ________ of the previously added nucleotide.

Fill in the blank(s) with the appropriate word(s).


Ans: 5 '-phosphate / 3'-hydroxyl

Biology & Microbiology

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Which of the following emergence factors has contributed to the HIV/AIDS epidemic?

A) climate change B) rapid pathogen adaptation and change C) increasing travel to endemic areas D) exotic pet and meat trade

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In recombinant DNA methods, the term vector can refer to _____

A) the enzyme (endonuclease) that cuts DNA into restriction fragments B) the "sticky end" of a DNA fragment C) a SNP marker D) a plasmid used to transfer DNA into a living cell E) a DNA probe used to identify a particular gene

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Which of the following is not a typical capsid shape?

A. Helical B. Tetrahedral C. Complex D. Icosahedron

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