The binding of a neurotransmitter to ligand-gated Na+ channels will cause ____ in the postsynaptic membrane
a. depolarization only
b. hyperpolarization
c. repolarization only
d. apolarization
e. depolarization and repolarization
ANSWER: a
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Transcription
a. occurs on the surface of the ribosome. b. is the final process in the assembly of a protein. c. occurs during the synthesis of any type of RNA from a DNA template. d. is catalyzed by DNA polymerase. e. fits all of these descriptions.
Through recombinant DNA technology, many plants now can manufacture their own Bt toxin, which improves fermentation
Indicate whether the statement is true or false
This bacterium's ability to survive in a human who is taking penicillin pills may be due to the presence of which of the following?
1. penicillin-resistance genes 2. a gram-positive cell wall 3. a gram-negative cell wall 4. an endospore
Visual acuity is highest when an image is focused on what part of the retina?
A. Anywhere, as long as there is ample light B. Cones within the fovea C. Rods outside the fovea D. Cones outside the fovea E. Rods within the fovea