Acetylcholine is a neurotransmitter released by motor neurons that causes skeletal muscle fibers to relax.
a. true
b. false
Answer: b. false
Biology & Microbiology
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Most microorganisms assimilate nitrogen as ________.
A. nitrite B. nitrate C. N2 D. hydrazine
Biology & Microbiology
Proteins function ____
a. as energy carriers b. as the ‘backbone' of the DNA molecule c. as component parts of enzymes d. in energy storage within the cell nucleus e. in transmission of genetic information
Biology & Microbiology
The light-harvesting units in the thylakoid membranes are the ________.
A. electrons B. ATP molecules C. photosystems D. ATP synthases E. grana
Biology & Microbiology
The DNA-histone complex is most analogous
to
a. a pearl necklace. b. a waterproof watch. c. a microwave oven. d. the gears on a bicycle. e. a flashlight
Biology & Microbiology