All of the following are associated with nucleic acid structure EXCEPT

A) ribose.
B) hydrogen bonds.
C) uracil.
D) ionic bonds.
E) phosphate.


D

Biology & Microbiology

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What type of enzyme regulation is illustrated here?



a. allosteric inhibition
b. allosteric activation
c. feedback inhibition
d. dehydration inhibition

Biology & Microbiology

The most common limit to plant growth is a lack of

a. phosphorous. b. carbon. c. hydrogen. d. oxygen. e. nitrogen.

Biology & Microbiology

The most economically important bryophyte is:

a. Equisetum. b. Anthoceros. c. Psilotum. d. Sphagnum. e. Lycopodium

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The traditional class Reptilia is ____ because it does not include all descendants of the most recent common ancestor

of reptiles. a. monophyletic b. paraphyletic c. polyphyletic d. sister taxa e. cladistic

Biology & Microbiology