. coli strains toxic to humans live in the intestine of ____ without sickening them
I. birds and frogs
II. goats and sheep
III. cattle and deer
a. I only
b. I and II
c. II and III
d. I and III
e. I, II, III
ANSWER: c
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What will be an ideal response?
Catabolite activator protein:a
increases the affinity of the promoter region for RNA polymerase. b. decreases RNA polymerase activity. c. becomes nonfunctional when it binds to AMP. d. binds and activates RNA polymerase. e. blocks RNA polymerase access to the DNA template
A photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific reaction center chlorophyll, which in turn passes the energy to
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