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
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In nondisjunction one or more pairs of chromosomes ____
a. are deleted b. are duplicated c. undergo translocation
d. undergo random mutations e. fail to separate
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
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
Which of the following is not a typical capsid shape?
A. Helical B. Tetrahedral C. Complex D. Icosahedron