On May 14, 1796, Jenner<span> took fluid from a cowpox blister and scratched it into the skin of James Phipps, an eight-year-old boy. A single blister rose up on the spot, but James soon recovered. On July 1, </span>Jenner<span> inoculated the boy again, this time with smallpox matter, and no disease developed. The </span>vaccine<span> was a success.</span>
Answer is: C
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in addition to that; (it's pairs of 4 types of (c))
A is the active site and C is the enzyme
Answer:
By looking at the gene sequences. See the mutations.
Explanation: