Biochemistry - Structure and Properties of Peptides
Exercise :: Structure and Properties of Peptides - Section 1
- Structure and Properties of Peptides - Section 1
| 26. |
Hemoglobin has quaternary structure and is made up of |
| A. |
six polypeptide chains, two α-chains and four β-chains | | B. |
two polypeptide chains, one α-chains and one β-chains | | C. |
four polypeptide chains, two α-chains and two β-chains | | D. |
five polypeptide chains, two α-chains and three β-chains |
Answer: Option C
Explanation:
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| 27. |
When pO2 = Kd of myoglobin, the fractional saturation (YO2) is about |
Answer: Option B
Explanation:
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| 28. |
Peptides in the fully extended chain conformation |
| A. |
have Y = F = 180° | | B. |
do not occur in nature | | C. |
also have a cis geometry in their peptide bonds | | D. |
are equivalent to the (3-sheet structure |
Answer: Option A
Explanation:
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| 29. |
The oxygen in hemoglobin and myoglobin is bound to |
| A. |
the iron atom in the heme group | | B. |
the nitrogen atoms on the heme | | C. |
histidine residues in the protein | | D. |
lysine residues in the protein |
Answer: Option A
Explanation:
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| 30. |
Which of the three subunits of the G proteins binds GDP and GTP? |
Answer: Option A
Explanation:
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