MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What are the following is not a factor responsible for the denaturation of proteins? |
| A. | pH change |
| B. | Organic solvents |
| C. | Heat |
| D. | Charge |
| Answer» E. | |
| 2. |
Unfolding of a protein can be termed as _________ |
| A. | Renaturation |
| B. | Denaturation |
| C. | Oxidation |
| D. | Reduction |
| Answer» C. Oxidation | |
| 3. |
Which of the following information is responsible to specify the three-dimensional shape of a protein? |
| A. | The protein’s peptide bond |
| B. | The protein’s amino acid sequence |
| C. | The protein’s interaction with other polypeptides |
| D. | The protein’s interaction with molecular chaperons |
| Answer» C. The protein’s interaction with other polypeptides | |
| 4. |
The average molecular weight of an amino acid residue in a protein is about _________ |
| A. | 128 |
| B. | 118 |
| C. | 110 |
| D. | 120 |
| Answer» D. 120 | |
| 5. |
The factor which does not affect pKa value of an amino acid is _________ |
| A. | The loss of charge in the α-carboxyl and α-amino groups |
| B. | The interactions with other peptide R groups |
| C. | Other environmental factors |
| D. | Molecular weight |
| Answer» E. | |
| 6. |
A tripeptide has _________ |
| A. | 3 amino acids and 1 peptide bond |
| B. | 3 amino acids and 2 peptide bonds |
| C. | 3 amino acids and 3 peptide bonds |
| D. | 3 amino acids and 4 peptide bonds |
| Answer» C. 3 amino acids and 3 peptide bonds | |
| 7. |
Peptide bond is a _________ |
| A. | Covalent bond |
| B. | Ionic bond |
| C. | Metallic bond |
| D. | Hydrogen bond |
| Answer» B. Ionic bond | |
| 8. |
WHICH_OF_THE_FOLLOWING_INFORMATION_IS_RESPONSIBLE_TO_SPECIFY_THE_THREE-DIMENSIONAL_SHAPE_OF_A_PROTEIN??$ |
| A. | The protein’s peptide bond |
| B. | The protein’s amino acid sequence |
| C. | The protein’s interaction with other polypeptides |
| D. | The protein’s interaction with molecular chaperons |
| Answer» C. The protein‚Äö√Ñ√∂‚àö√ë‚àö¬•s interaction with other polypeptides | |
| 9. |
What are the following is not a factor responsible for denaturation of proteins?$ |
| A. | pH change |
| B. | Organic solvents |
| C. | Heat |
| D. | Charge |
| Answer» E. | |
| 10. |
Unfolding of a protein can be termed as$ |
| A. | Renaturation |
| B. | Denaturation |
| C. | Oxidation |
| D. | Reduction |
| Answer» C. Oxidation | |
| 11. |
Which part of the amino acid gives it uniqueness? |
| A. | Amino group |
| B. | Carboxyl group |
| C. | Side chain |
| D. | None |
| Answer» D. None | |
| 12. |
Which of the following is not the classified form of conjugated proteins? |
| A. | Lipoproteins |
| B. | Glycoproteins |
| C. | Metalloproteins |
| D. | Complete proteins |
| Answer» E. | |
| 13. |
The average molecular weight of an amino acid residue in a protein is about |
| A. | 128 |
| B. | 118 |
| C. | 110 |
| D. | 120 |
| Answer» D. 120 | |
| 14. |
Which of the following is a 39-residue hormone of the anterior pituitary gland? |
| A. | Corticotropin |
| B. | Glucagon |
| C. | Insulin |
| D. | Bradykinin |
| Answer» B. Glucagon | |
| 15. |
The factor which does not affect pKa value of an amino acid is |
| A. | The loss of charge in the α-carboxyl and α-amino groups |
| B. | The interactions with other peptide R groups |
| C. | Other environmental factors |
| D. | Molecular weight |
| Answer» E. | |
| 16. |
A tripeptide has |
| A. | 3 amino acids and 1 peptide bond |
| B. | 3 amino acids and 2 peptide bonds |
| C. | 3 amino acids and 3 peptide bonds |
| D. | 3 amino acids and 4 peptide bonds |
| Answer» C. 3 amino acids and 3 peptide bonds | |
| 17. |
Peptide bond is a |
| A. | Covalent bond |
| B. | Ionic bond |
| C. | Metallic bond |
| D. | Hydrogen bond |
| Answer» B. Ionic bond | |
| 18. |
During the formation of the peptide bond which of the following takes place? |
| A. | Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid |
| B. | Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid |
| C. | Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid |
| D. | Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid |
| Answer» B. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid | |