Some viruses can be crystallized and their structures analyzed. one such virus is yellow mottle virus, which infects beans. this virus has a single-stranded rna genome containing about 6,300 nucleotides. its capsid is 25-30 nm in diameter and contains 180 identical capsomeres.
1) if the yellow mottle virus capsid has 20 facets, how many proteins form each facet?
a) 1
b) 5
c) 9
d) 20
e) 180

The correct answer is c. That is 9 protein to form each facet

Explanation:

Given that the capsids is 25-30nm in diameter and it contains 180 identical capsomeres, if the virus capsid has 20 facets in 180 capsomeres, then for each protein facet, it will contain 9 protein facets.

Thai is 180 capsomeres divided by total number of facets (20).

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

the answer is c.) there is a warm front in region a and a stationary front in region b.