BIOMOLECULES AND ENZYMES

BIOLOGY

STRUCTURE OF PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which level of protein structure is formed solely by covalent bonds?
A
Primary
B
Secondary
C
Tertiary
D
Quaternary
Explanation: 

Detailed explanation-1: -Covalent, peptide bonds which connect the amino acids together maintain the primary structure of a protein.

Detailed explanation-2: -Tertiary structure, producing the unique structure of a protein, is stabilized by interactions among the R groups on each amino acid in the protein. Tertiary structure may be stabilized by covalent bonds, called disulfide bridges, that form between the sulfhydryl groups (SH) of two cysteine monomers.

Detailed explanation-3: -The primary structure is held together by covalent peptide bonds. They are formed during the process of protein biosynthesis, where the amino acids lose one water molecule per reaction to attach to another amino acid. The secondary structure is determined by hydrogen bonds between the main-chain peptide groups.

Detailed explanation-4: -To reiterate, the primary structure of a protein is defined as the sequence of amino acids linked together to form a polypeptide chain. Each amino acid is linked to the next amino acid through peptide bonds created during the protein biosynthesis process.

Detailed explanation-5: -Primary protein structure is when amino acids bound are together via covalent peptide bonds to form a polypeptide chain. These bonds form between the N terminal and C terminal of amino acids and are highly resistant to heat or chemicals.

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