In electron micrographs of HSV infection, it can be seen that the intact virus initially reacts with cell surface proteoglycans, then with specific receptors. This is later followed by viral capsids docking with nuclear pores
Afterward, the capsids go from being full to being "empty." Which of the following best fits these observations?
A) Viral capsids are needed for the cell to become infected; only the capsids enter the nucleus.
B) The viral envelope is not required for infectivity, since the envelope does not enter the nucleus.
C) Only the genetic material of the virus is involved in the cell's infectivity, and is injected like the genome of a phage.
D) The viral envelope mediates entry into the cell, the capsid mediates entry into the nuclear membrane, and the genome is all that enters the nucleus.
E) The viral capsid mediates entry into the cell, and only the genomic DNA enters the nucleus, where it may or may not replicate.
Answer: D
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A. methane is generated by archaeons living in the guts of cattle, and beef production is increasing. B. methane is generated by archaeons living in waterlogged rice paddies, and rice production is increasing. C. methane is released when permafrost at high latitudes melts, and more permafrost is melting. D. methane is generated by archaeons living in the guts of cattle and in rice paddies, and both beef and rice production are increasing. E. All of the above.
At which enzymatic step of glycolysis is water a product?
A) 3 B) 5 C) 6 D) 9 E) 10
Ephedrine is a stimulant that is derived from a member of the phylum
A. Hepaticophyta. B. Gnetophyta. C. Pterophyta. D. Cycadophyta.
tRNAs bind to the mRNA via their ____________________. Fill in the blank(s) with the appropriate word(s)