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ANTONII [103]
3 years ago
5

Which of the following includes only biotic factors?

Biology
1 answer:
WITCHER [35]3 years ago
6 0
D.

A population consists of only the members of a certain specie of organisms, meaning it has only biotic factors.
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Answer and Explanation:

a. form the antigen-binding site ⇒ both chains

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c. are found in the Fab fragment ⇒ both chains

The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.  

d. are found in the FC fragment ⇒ heavy chains

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e. contain only one constant domain ⇒ light chains

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f. contain multiple constant domains ⇒ heavy chains

Each heavy chain contains three constant domains: CH¹, CH² and CH³.  

g. contain only one variable domain ⇒ both chains

Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.

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