When epidermal growth factor binds to its _____________, the receptor phosphorylates itself, triggering a signal transduction pathway.

A. thermoreceptor
B. G-protein coupled receptor
C. mechanoreceptor
D. ligand-gated ion channel receptor
E. enzyme-linked receptor


E. enzyme-linked receptor

Biology & Microbiology

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Many species in the phylum Crenarchaeota are considered extreme thermophiles or _______, which can grow at temperatures above 100°C.

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

Biology & Microbiology

The difference between an akinete and endospore is that

A. Akinetes are whole cells filled with food, whereas endospores are bodies produced inside of cells. B. Akinetes are not capable of locomotion whereas endospores move freely. C. Akinetes cannot resist stressful conditions whereas endospores can. D. Endospores cannot resist stressful conditions whereas akinetes can. E. Akinetes are reproductive structures whereas endospores are dormant, resistant structures.

Biology & Microbiology

Antigenic variation occurs almost yearly with the influenza ________ virus.

A. B B. C C. D D. A

Biology & Microbiology

The field of sociobiology was much expanded by the book, Sociobiology: The New Synthesis, writtenby:a

K. Lorenz. b. N. Tinbergen. c. W. Hamilton. d. W. Dilger. e. E. O. Wilson

Biology & Microbiology