Biochemistry - Structure and Properties of Peptides
Exercise :: Structure and Properties of Peptides - Section 1
- Structure and Properties of Peptides - Section 1
| 11. |
An oil drop with a polar coat is a metaphor referring to the three dimensional structure of |
| A. |
fibrous proteins | | B. |
collagen | | C. |
globular proteins | | D. |
silk protein |
Answer: Option C
Explanation:
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| 12. |
What was the first protein whose complete tertiary structure was determined? |
| A. |
Lysozyme | | B. |
Myoglobin | | C. |
Pancreatic ribonuclease | | D. |
Pancreatic DNase |
Answer: Option B
Explanation:
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| 13. |
The peptide bond in proteins is |
| A. |
planar, but rotates to three preferred dihedral angles | | B. |
nonpolar, but rotates to three preferred dihedral angles | | C. |
nonpolar, and fixed in a trans conformation | | D. |
planar, and usually found in a trans conformation |
Answer: Option D
Explanation:
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| 14. |
In β-pleated sheet structures neighbouring |
| A. |
chains lie in a flat plane | | B. |
neighboring residues are hydrogen bonded | | C. |
neighboring chains are connected by a-helices | | D. |
neighboring chains are hydrogen bonded |
Answer: Option D
Explanation:
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| 15. |
The same peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala. was digested with chymotrypsin to produce |
| A. |
Val-Lys + Glu-Met-Ser + Trp-Arg-Ala. | | B. |
Val-Lys-Glu-Met-Ser-Trp + Arg-Ala. | | C. |
Val-Lys-Glu-Met-Ser + Trp-Arg-Ala. | | D. |
Val-Lys-Glu-Met + Ser-Trp-Arg-Ala. |
Answer: Option B
Explanation:
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