Which feature, if changed, would NOT abolish M13's utility as a cloning vector?

A) ssDNA genome becoming a dsDNA genome
B) loss of genes that make coat proteins
C) replacing the segment of non-coding DNA in its genome with an indispensible gene
D) switch from lysogenic to lytic lifestyle


Answer: A

Biology & Microbiology

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The rate differences between molecular clocks are due largely to differences in _____. Thus, the extreme case of a fast molecular clock is derived from a _____

A. the intensity of selection; histone proteins B. the size of the molecule; pseudogenes C. the intensity of selection; pseudogene D. the size of the molecule; histone proteins E. none of these

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The antibody IgE directly triggers _______.

What will be an ideal response?

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Inoculating loops are generally sterilized using

A) moist heat. B) incineration. C) chemicals. D) filtration.

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Fungi are at least ________ million years old.

A. 400 B. 1 C. 50 D. 100 E. 25

Biology & Microbiology