Genetics - Section 3 Multiple Questions and Answers.




11.Fibrous protein such as silk fibroin consists of polypeptide chains arranged in
A. α-helix
B. β-pleated sheet
C. β-helix
D. none of these

12. α-helix has
A. 3.4 amino acid residues/turn
B. 3.6 amino acid residues/turn
C. 3.8 amino acid residues/turn
D. 3.0 amino acid residues/turn

13.Tertiary structure is maintained by
A. peptide bond
B. hydrogen bond
C. di-sulphide bond
D. All of these

14.Haemoglobin has
A. primary structure
B. secondary structure
C. tertiary structure
D. quaternery structure

15. Disulphide bonds are formed between
A. cysteine residues that are close together
B. cystine residues that are close together
C. proline residues that are close together
D. histidine residues that are close together

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