Which of the following base pairs is mismatched:

A. adenine; thymine
B. guanine; uracil
C. cytosine; guanine
D. adenine; uracil


guanine; uracil

Biology & Microbiology

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Which substance will absorb hydrogen from a solution? a. Base b. Acid c. All of these choices

d. None of these choices. e. Buffer

Biology & Microbiology

The tropical rainforest trees form shallow roots concentrated near the surface in a mat few centimeters thick. These

swollen bases or braces are called:a. prop roots. b. pneumatophores. c. aerial roots. d. buttress roots. e. velamen roots.

Biology & Microbiology

One widely used cladistic method of examining evolutionary relationships is ________, which is based on the assumption that evolution is most likely to have proceeded by the path requiring fewest changes

A) topology B) neighbor joining C) parsimony D) systematics

Biology & Microbiology

The molecular explanation for narcolepsy is that

A) certain brain cells have many extra orexin/hypocretin receptors, so these cells receive too many messages to sleep. B) the orexin/hypocretin receptor does not reach the cell surfaces of certain brain cells. C) a gene is missing in chromosome 6 that encodes the protein narcoleptin. D) a viral infection activates genes that promote sleep.

Biology & Microbiology