All of the following are lipids except
A. starch.
B. phospholipid.
C. wax.
D. cholesterol.
E. triglyceride.
Answer: A
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DNA and RNA contain functional units known as:
A. peptides. B. enzymes. C. amino acids. D. nucleotides. E. fatty acids.
T-cell receptors can only recognize antigens on the surfaces of antigen-presenting cells; they cannot bind free antigen.
Answer the following statement true (T) or false (F)
Why might it be more difficult to prepare a vaccine against noroviruses than against rotaviruses?
A. We haven't been able to culture noroviruses in a lab setting yet. Without a starting culture, we can't create a vaccine. B. Noroviruses are RNA viruses, where rotaviruses are DNA viruses. RNA viruses mutate far more easily than DNA viruses, so we COULD make a vaccine, but it would be rendered useless fairly quickly as the virus mutates. C. We lack a proper culturing method for large-scale production of target cells for norovirus, whereas we have such a system for the target cells of rotaviruses. Without a system to get large numbers of target cells, we can't produce a vaccine. D. Norovirus is much more infectious than rotavirus. As such, it's much harder to work with safety. This makes production of a vaccine too dangerous and unpredictable
what does VZV cause?
What will be an ideal response?