Poliovirus receptors are found
A. in spinal cord anterior horn cells only.
B. in cells of all tissues.
C. in gut cells only.
D. in nasopharynx, gut, and spinal cord anterior horn cells.
Answer: D
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The general name for enzymes that catalyze RNA synthesis directed by a DNA template is:
A. RNA synthetase. B. RNA polymerase. C. polynucleotide phosphorylase. D. RNase. E. DNA polymerase.
________ is the turnover number for a given enzyme.
Fill in the blank(s) with the appropriate word(s).
Ambient air, which contains 21% oxygen (O2) and a small amount (0.03%) of carbon dioxide (CO2), is the environmental condition that best suits which type of organism?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
Identify the stage of mitosis shown in panel A
a. interphase b. prophase c. metaphase d. anaphase e. telophase