A negative RNA virus must first
A. synthesize a negative RNA copy of its genome.
B. synthesize a positive RNA copy of its genome.
C. transcribe RNA polymerase.
D. synthesize a DNA copy of its genome.
E. transcribe reverse transcriptase.
Answer: B
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Members of the phylum ____ exhibit radial symmetry, with their body parts arranged regularly around a central axis
a. Porifera b. Mollusca c. Cnidaria d. Platyhelminthes e. Chordata
How are binary fission and mitosis different?
a. Binary fission is found in eukaryotes, while mitosis is not. b. Mitosis helps an organism to grow, while binary fission does not. c. Mitosis does not occur in phases, while binary fission does. d. Binary fission helps an organism to grow, while mitosis does not.
Many chaperones are called heat-shock proteins because they
a. are expressed at higher levels after a heat shock than at normal growth conditions. b. cause fever in mammals. c. misfold during a heat shock. d. denature at high temperatures.
The period of time in which the ventricles contract is known as ventricular ________
Fill in the blank(s) with correct word