Somatostatin is secreted by
a. pancreatic islet cells.
b. the thyroid gland.
c. the pituitary gland.
d. the adrenal medulla.
e. the adrenal cortex.
A
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Most of the genetic diversity on earth resides in viral genomes
Indicate whether the statement is true or false.
The sequence of genes in each T4 virus within a population is the same but starts with a different gene at the 5' end. If each of these linear pieces is circularized, the gene sequences would be identical. The T4 DNA, therefore, is described as being
A. a linear repeat. B. circularly permuted. C. linearly palindromic. D. two fold rotationally symmetrical.
If you wanted to prevent a cell from entering the lysogenic pathway, which gene controlled by PRM would you target for inactivation?
A) cro B) Q C) cI D) cII E) O
Reaction center complexes of the light-dependent reactions contain __________ and __________,
which receive energy from __________. a. accessory pigments; chlorophyll; antenna complexes b. carotenoids; proteins; chlorophyll c. chlorophyll; antenna complexes; carotenoid d. proteins; antenna complexes; carotenoid e. chlorophyll; proteins; antenna complexes