The structural level of a protein least affected by a disruption in hydrogen bonding is the A. primary level B. secondary level C. tertiary level D. quaternary level

Option A.

The primary level.

Explanation:

Primary level of protein refer to the specific sequence of amino acids in a polypeptide bond and disulfide bond location. Primary level of protein is held together by peptide bond. Primary level of protein is not affected by disruption In hydrogen bond because it is not held by hydrogen bond.

Hydrogen bond is found in both secondary and tertiary level.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

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