Genetics - Section 3 | Multiple Questions and Answers

22.	The primary structure of the protein represents

	A.	linear sequence of amino acids joined by peptide bond
	B.	The 3-dimensional structure of protein
	C.	the helical structure of protein
	D.	subunit structure of protein

23.	Which of the following statements about amino acids is correct?

	A.	Amino acids are classified according to the structures and properties of their side chains.
	B.	Amino acids in proteins are mainly in the D-configuration.
	C.	Amino acids are unchanged at neutral pH
	D.	Twenty four amino acids are commonly used in protein synthesis.

24.	Which type of bonding is responsible for the secondary structure of proteins?

	A.	Disulfide bridge between cysteine residues.
	B.	Peptide bonds between amino acids.
	C.	Hydrogen bonding between the C=O and N-H groups of peptide bonds.
	D.	Salt bridge between charged side chains of amino acids.

25.	Which of the following most accurately describes how secondary structure in proteins is stabilized?

	A.	Through ionic bonds operating between oppositely charged amino acid side chains.
	B.	Through covalent bonds joining different parts of the peptide backbone.
	C.	Through hydrogen bonds between different amino acids side chains.
	D.	Through hydrogen bonds joining different parts of the peptide backbone.