When bound to ligand, this type of receptor changes conformation to allow ions to move down their concentration gradient across the membrane.

A. channel-linked receptor
B. enzymatic receptor
C. steroid hormone receptor
D. G protein-coupled receptor


Answer: A

Biology & Microbiology

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The fungus used in the production of saki and soy sauce is ________.

A. Saccharomyces cerevisiae B. Aspergillus fumigatus C. Aspergillus nidulans D. Aspergillus oryzae

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In the figure above, the amount of energy

symbolized by the line "A" would be the

a. reactant energy. b. product energy. c. cofactor energy. d. activation energy. e. intermediate energy.

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The interaction between panic grass and its endophyte fungus that allows them to grow at 65°C together, but not independently, is an example of

A. commensalism. B. predation. C. parasitism. D. competition. E. mutualism.

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A molecule is

a. a combination of two or more atoms. b. a mixture of atoms. c. electrically charged. d. a carrier of one or more extra neutrons. e. none of these

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