How do paracrine signals work?
What will be an ideal response?
Ans: They diffuse to and affect neighboring cells
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Neurotransmitters always cause depolarization of the postsynaptic membrane
Indicate whether the statement is true or false
A gene found on the X chromosome is a(n)
A. female gene. B. X-linked gene. C. dominant gene. D. locus.
Molecules that absorb light are called
A. absorbers. B. enzymes. C. pigments. D. electron carriers. E. photosynthesizers.
Normally, the mold Neurospora can synthesize all 20 amino acids. A certain strain of this mold cannot grow in minimal nutritional medium, but grows only when the amino acid leucine is added to the medium. This strain
A. has a mutation in the gene that encodes the leucine tRNA B. has a mutation in the gene that encodes the enzyme that "charges" the leucine tRNA\ C. is dependent on leucine for energy D. has a mutation affecting the biochemical pathway leading to the synthesis of leucine