Enzymes Mdcat Mcqs Online Test 1

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Instructions for Chapter Enzymes Online Test Mdcat-2023:

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Test Details:

  • Subject: Biology
  • Class: 1st year or 11
  • Chapter name: Enzyme
  • Test: MDCAT 2023
  • Book: Sindh Textbook
  • Total No. Of MCQS: 50
  • Time Allowed: 50 Minutes
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Mdcat Biology XI Enzymes Mcqs test 1



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1 / 50

1. In an endergonic reaction:

 

2 / 50

2. The concept of “Ribozymes” was given by:

3 / 50

3. Most enzymatic pathways are regulated by

4 / 50

4. Substrate and enzyme once the product is consumed the inhibition also _________ and form _________ product

5 / 50

5. Which of the following is true regarding competitive and noncompetitive inhibition?

6 / 50

6. The term Enzymes are  coined by

7 / 50

7. Mg +2 is an inorganic activator for enzymes:

8 / 50

8. An uncatalyzed reaction involved:

9 / 50

9. Which of the following is produced with the combination of apoenzyme and coenzyme:

10 / 50

10. The inhibition caused by the final end product of reaction is called

11 / 50

11. All are correct for active sites EXCEPT?

12 / 50

12. Which of the followings is(are) the co-factor(s) for an enzyme.

13 / 50

13. Cofactors:

14 / 50

14. Nicotinamide adenine dinucleotide NAD+ is:

15 / 50

15. What is correct for apo-enzyme.

16 / 50

16. Enzymes are functional:

17 / 50

17. Which is correct for enzymes?

18 / 50

18. A catalyst will make a reaction

19 / 50

19. All of the following are correct for enzymes EXCEPT:

20 / 50

20. Competitive inhibitor overcome by adding substrate  show that :

21 / 50

21. In non-competitive inhibition the extent of inhibition depends only on

22 / 50

22. All coenzyme are derived from:

23 / 50

23. Which of the following comprises of inorganic ions :

24 / 50

24. Enzymes are generally inactivited rapidly by exposure to UV high and also alpha , beta rays because it's alters the :

25 / 50

25. At about 0°C most enzymes are:

26 / 50

26. A coenzyme constitute about certain % of portion of entire enzyme.

27 / 50

27. In the lock and key model of enzyme action, the part of enzymes recognizes the substrate is known as :

28 / 50

28. DDT are inhibitors of key enzymes in :

29 / 50

29. Parathion  are ___________.

30 / 50

30. Enzymes minus it's coenzyme is referred to as the :

31 / 50

31. Optimum pH value for pepsin is :

32 / 50

32. Competitive inhibitor stop an enzymes from working by ;

33 / 50

33. Every Enzymes function effectively at :

34 / 50

34. The reversible inhibitors constitute :

35 / 50

35. The non-protein part of an enzyme is called

36 / 50

36. Which molecule binds with the active site of enzyme?

37 / 50

37. The structure of enzyme consists of:

38 / 50

38. The reactants of enzymatic reactions are called:

39 / 50

39. Enzyme have enormous power of :

40 / 50

40. What is the meaning of an enzyme?

41 / 50

41. Which are biological catalysts?

42 / 50

42. Lock and Key model was proposed by

43 / 50

43. A three-dimensional cavity bearing a specific charge by which the enzyme reacts with its substrate is called

44 / 50

44. Enzymes _________ the activation energy of a chemical reaction

45 / 50

45. Which one forms the raw material for coenzymes?

46 / 50

46.  

An activated enzyme consisting of the polypeptide chain and a cofactor is called:

47 / 50

47. Which statement about enzyme is incorrect:

48 / 50

48. Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called

49 / 50

49. Zinc plays important role as activator for which of the following enzymes?

50 / 50

50. In certain enzymatic pathways, _______ act as inhibitors.

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