Enzymes Mcqs Online Test 1

1. In an endergonic reaction:

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

3. Most enzymatic pathways are regulated by

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

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

6. The term Enzymes are  coined by

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

8. An uncatalyzed reaction involved:

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

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

11. All are correct for active sites EXCEPT?

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

13. Cofactors:

14. Nicotinamide adenine dinucleotide NAD+ is:

15. What is correct for apo-enzyme.

16. Enzymes are functional:

17. Which is correct for enzymes?

18. A catalyst will make a reaction

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

20. Competitive inhibitor overcome by adding substrate  show that :

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

22. All coenzyme are derived from:

23. Which of the following comprises of inorganic ions :

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

25. At about 0°C most enzymes are:

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

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

28. DDT are inhibitors of key enzymes in :

29. Parathion  are ___________.

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

31. Optimum pH value for pepsin is :

32. Competitive inhibitor stop an enzymes from working by ;

33. Every Enzymes function effectively at :

34. The reversible inhibitors constitute :

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

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

37. The structure of enzyme consists of:

38. The reactants of enzymatic reactions are called:

39. Enzyme have enormous power of :

40. What is the meaning of an enzyme?

41. Which are biological catalysts?

42. Lock and Key model was proposed by

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

44. Enzymes _________ the activation energy of a chemical reaction

45. Which one forms the raw material for coenzymes?

46.  

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

47. Which statement about enzyme is incorrect:

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

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

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