During this stage of mitosis, the nuclear envelope begins to break down and the spindle begins to form.
A. Metaphase
B. Prometaphase
C. Anaphase
D. Prophase
E. Telophase
Answer: D
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An organ must contain at least:
A. two different tissue types. B. two different cell types. C. all four of the tissue types. D. connective tissue. E. two different muscle types.
If a toxin blocks the receptors for the neurotransmitter on the postsynaptic muscle cell,
____________________.
a. paralysis will occur b. the person will have a seizure c. the action potential in the presynaptic cell fails d. calcium, which can function as a neurotransmitter, will be released
You recently identified a novel protein that contains several membrane-spanning domains. You would predict that the amino acids embedded in the membrane would have ________ side groups.
A. polar uncharged B. positively charged C. nonpolar D. negatively charged
The protein required for the establishment and maintenance of lysogeny in cells infected with the temperate bacteriophage lambda is the ________.
A. lambda repressor B. lambda cos C. lac repressor D. lambda Xis and Int proteins