Most plant viruses have genomes made of:
A. single-stranded DNA.
B. double-stranded DNA.
C. proteins.
D. single-stranded RNA.
E. double-stranded RNA.
D
You might also like to view...
You eat a bowl of beans as part of your dinner. As you digest the beans, the proteins that are present get broken down to their component amino acids. As your body destroys the macromolecules that were present in the beans, is the energy present in those molecules destroyed?
A. Yes. By breaking down these macromolecules, some of the energy they contained is destroyed. B. No. While the vast majority of the energy contained in these macromolecules is converted to heat, it is not actually destroyed. C. No. The energy contained within these macromolecules is converted into other forms of chemical energy and kinetic energy, though some is lost as heat. D. No. Breaking down molecules does not lead to the release of energy.
What is the fate of CoA after it delivers an acetyl group into the citric acid cycle?
a. It is degraded and used for energy. b. It is recharged with another acetate. c. It is used in protein synthesis. d. It remains in an inactive form until the cell dies. e. It is reused to start glycolysis.
Following a nerve impulse, what triggers the opening of plasma membrane voltage-gated Ca2+ channels?
a) membrane hypopolarization b) binding of an appropriate ligand c) membrane depolarization d) binding of K+ ions e) membrane hyperpolarization
The classic experiments conducted by Meselson and Stahl demonstrated that DNA replication is accomplished by employing a ________________ mechanism
(a) continuous (b) semiconservative (c) dispersive (d) conservative