Over the course of evolutionary time, what should occur?

A) Methylated DNA should become fixed in the gene pools of bacterial species.
B) Nonmethylated DNA should become fixed in the gene pools of bacteriophages.
C) Methylated DNA should become fixed in the gene pools of bacteriophages.
D) Methylated and nonmethylated strains should be maintained among both bacteria and bacteriophages, with ratios that vary over time.
E) Both A and B are correct.


Ans: D) Methylated and nonmethylated strains should be maintained among both bacteria and bacteriophages, with ratios that vary over time.

Biology & Microbiology

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A) bacteria. B) mitochondria. C) chloroplasts. D) plasmids. E) protists.

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Amino acid breakdown by the liver produces _____ , which is very toxic to cells

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

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Refer to Figure 49-1. Which of the following is a steroid hormone?


a. 1
b. 3
c. 6
d. 8
e. 10

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The main purpose of polymerase chain reaction (PCR) is to generate many copies of a region of DNA.

Answer the following statement true (T) or false (F)

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