Most viruses form a capsid around their nucleic acid core. This capsid is composed of
A. proteins.
B. monosaccharides.
C. glycoproteins.
D. lipoproteins.
A. proteins.
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Which statement best explains why embryos with a missing autosome are not found among spontaneously aborted fetuses?
A. These embryos occur less often than those with an extra autosome. B. Fertilization does not occur under these circumstances. C. Pregnancy is not recognized because an abortion occurs shortly after fertilization. D. These embryos do not get aborted but continue to live birth. E. None of the statements are correct.
According to the fossil record, which of the following jawed fishes diversified in the Devonian and Carboniferous periods, but left no direct descendants?
a. placoderms b. ostracoderms c. osteolepiforms d. conodonts
Which of the following methods is NOT a method of viral release?
a. Exocytosis b. Budding c. Apoptosis d. Injection e. None of these are methods of viral release
One strand of DNA serves as a template for the synthesis of another so that __________.
A. the progeny of each cellular replication gets the same genetic information B. there are two copies of each gene on a single DNA molecule C. DNA can serve as a template for the synthesis of other polymers D. the helical shape of DNA is conserved