The leukocyte that contains histamine is the

A. lymphocyte.
B. monocyte.
C. macrophage.
D. basophil.


D

Biology & Microbiology

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Which scientist(s) discovered the basis for the

base-pair rule, which stated that the amounts of adenine in all DNA are the same, as are the amounts of cytosine and guanine?

a. Watson and Crick b. Beadles c. Chargaff d. Franklin e. Pauling

Biology & Microbiology

Eukaryotic transcription factors:a

are always simpler than bacterial regulators. b. may be activators or repressors of transcription. c. are inducers. d. are corepressors. e. are also known as enhancers

Biology & Microbiology

Flattened sacs of internal membranes associated with photosynthesis are called

A. cristae. B. chloroplasts. C. thylakoids. D. photosystems. E. the stroma.

Biology & Microbiology

Pyruvate

A) forms at the end of glycolysis. B) is the molecule that starts the citric acid cycle. C) is the end product of oxidative phosphorylation. D) is a six-carbon molecule.

Biology & Microbiology