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Answer:
The answer is A.
Explanation:
Adaptive immunity recognizes antigens of viruses.
The man with blood type A might have one of two genotypes:
1. Iᵃ Iᵃ<span>
2. </span>Iᵃ i
In this case, Iᵃ is an allele for A group, and i is an allele for 0 group.
The ABO blood type is controlled by a single gene (the ABO gene) with three types of alleles (Iᵃ Iᵇ and i)
Why is the active site specific for only one type of substrate? Enzymes have a lock and key type fit so only a specific substrate fits in the activation site.
Covalent bonds are formed when two non metal atoms share an electron. The atoms either give up or gain an electron, due to the outer shell being unstable.
