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Home ‣ Biochemistry ‣ Structure and Properties of Peptides Comments
- Question
In the ?-pleated sheet
Options- A. hydrogen bonds are formed between the peptide bonds
- B. adjacent polypeptide chains can either be parallel or antiparallel
- C. the polypeptide chain is fully extended
- D. all of the above
- Correct Answer
- all of the above
- 1. Which of the following statements is incorrect?
Options- A. Protein G contains both a-helix and P-sheet
- B. Protein G contains only a-helix
- C. Fatty acid binding protein contains largely P-sheet
- D. Hemoglobin contains four sub-units Discuss
- 2. The oxygen binding curves of hemoglobin and myoglobin
Options- A. allow maximum transfer of oxygen to the tissues
- B. are a consequence of the quaternary structure of hemoglobin
- C. both (a) and (b)
- D. are identical Discuss
- 3. Which of the following is an example of tertiary structure in a protein?
Options- A. A multimeric protein
- B. An a-helix
- C. A P-pleated sheet
- D. A globular domain Discuss
- 4. When pO2 = Kd of myoglobin, the fractional saturation (YO2) is about
Options- A. 0.1
- B. 0.5
- C. 0.9
- D. 1.7 Discuss
- 5. What was the first protein whose complete tertiary structure was determined?
Options- A. Lysozyme
- B. Myoglobin
- C. Pancreatic ribonuclease
- D. Pancreatic DNase Discuss
- 6. In ?-pleated sheet structures neighbouring
Options- 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 Discuss
- 7. The same peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala. was digested with chymotrypsin to produce
Options- 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. Discuss
- 8. Which of the following statement is incorrect?
Options- A. Hemoglobin and myoglobin are the two oxygen binding proteins
- B. Hemoglobin transports O2 in the blood
- C. Myoglobin stores O2 in muscles
- D. None of the above Discuss
- 9. The peptide bond in proteins is
Options- 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 Discuss
- 10. The resonance structures that can be drawn for the peptide bond indicate that the peptide bond
Options- A. is stronger than an ordinary single bond
- B. has partial double bond character
- C. both (a) and (b)
- D. is still not completely understood Discuss
Structure and Properties of Peptides problems
Search Results
Correct Answer: Protein G contains only a-helix
Correct Answer: both (a) and (b)
Correct Answer: A globular domain
Correct Answer: 0.5
Correct Answer: Myoglobin
Correct Answer: neighboring chains are hydrogen bonded
Correct Answer: Val-Lys-Glu-Met-Ser-Trp + Arg-Ala.
Correct Answer: None of the above
Correct Answer: planar, and usually found in a trans conformation
Correct Answer: both (a) and (b)
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