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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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.
Most of the genetic diversity on earth resides in viral genomes
Indicate whether the statement is true or false.
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