Proteins | Biochemistry | GPAT Mock Test

Welcome to the GPAT Mock Test on Proteins. This quiz is specifically designed for B.Pharma graduates preparing for the GPAT examination. It covers essential biochemistry topics related to proteins, including their types, functions, digestion, absorption, denaturation, and metabolic pathways like the urea cycle, transamination, and deamination. You will also find questions on the role of proteins as enzymes, a fundamental concept in pharmacology. This test consists of 25 multiple-choice questions to help you assess your understanding and identify areas for improvement. After submitting your answers, you can review your score and see the correct responses highlighted. You can also download a PDF copy of all questions and their correct answers for offline revision. Good luck!

1. Which of the following is a characteristic of fibrous proteins like keratin?

2. The protein responsible for maintaining osmotic pressure in the blood plasma is:

3. Hemoglobin is an example of a:

4. Which of the following is a major structural protein found in connective tissue, skin, and bones?

5. A glycoprotein is a conjugated protein in which the prosthetic group is a:

6. Protein digestion begins in which part of the gastrointestinal tract?

7. The enzyme pepsin, responsible for protein digestion, is most active in which environment?

8. Trypsinogen is converted to its active form, trypsin, by the action of which enzyme?

9. The final products of protein digestion that are absorbed into the bloodstream from the small intestine are primarily:

10. Denaturation of a protein involves the disruption of which structures?

11. Which of the following is a common chemical denaturing agent that disrupts disulfide bonds?

12. The process where a denatured protein refolds into its original, biologically active conformation is called:

13. The urea cycle primarily occurs in which organ?

14. What is the rate-limiting enzyme of the urea cycle?

15. The two nitrogen atoms in a urea molecule are derived from:

16. The primary physiological function of the urea cycle is to:

17. Which intermediate of the urea cycle is transported from the mitochondria to the cytosol?

18. Creatinine is a metabolic waste product formed in muscle from:

19. Elevated serum creatinine levels are a key indicator of impaired function of which organ?

20. The coenzyme universally required for all transamination reactions is:

21. The reaction Alanine + α-ketoglutarate ⇌ Pyruvate + Glutamate is catalyzed by:

22. Oxidative deamination, catalyzed by glutamate dehydrogenase, results in the liberation of:

23. In enzyme kinetics, the Michaelis-Menten constant (Km) represents:

24. In competitive inhibition, the inhibitor binds to:

25. An allosteric enzyme is regulated by the binding of an effector molecule at a site: