Which of the following is found at the 5' end of a DNA strand?

A) a phosphate group
B) a hydrogen bond
C) a hydroxyl group
D) histones
E) a methyl group


A
Bloom's Taxonomy: Comprehension
Section: The Structure and Replication of Genomes
Learning Outcome: 7.2

Biology & Microbiology

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The most stable—that is, least reactive—form of carbon is:

A. ethanol. B. diamonds. C. glucose. D. pyruvate. E. carbon dioxide.

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Archaea use molecules with reactive side chains in their plasma membrane, so the tails of archaeal phospholipids form covalent bonds with one another. As a result, the plasma membrane is ____

a. more fluid b. less rigid c. less fluid d. able to contain more membrane proteins e. easily disturbed

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Which of the following is least likely to be a

cause of extinction? a. asteroid impact b. human activity c. adaptive radiation d. continental drift e. climate change

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Which species has been affected by global climate change?

a. polar bear b. sharks c. woodpeckers d. grizzly bears e. tree frogs

Biology & Microbiology