11th Class Biology MCQs Questions Answers Download pdf

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Biology – 1st Year
Chapter Name : Enzymes
Chapter No. 03
Question Type : Multiple Choice Questions [MCQ’s]
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.




Book Name :  Biology
Chapter No. 03
Chapter Name : Enzymes 
Total MCQ from Text Book :  73
Book Version  :
2021

Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade  : 11 ( F.Sc. Intermediate)
Total Marks : 73
Total Time :  73 minutes




محترم اساتذہ کرام و  پیارے طلبا و طالبات
ہم نے یہ ویب سائٹ آپ کے فائدے اور امتحانی تیاری کو مدنظر رکھ کر بنائی ہے۔ اگر آپ کو اس سے کوئی فائدہ ہوتا ہے اور آپ کو یہ ایم سی کیوز امتحان کی تیاری کے لئے سود مند ہیں ۔ تو آپ اپنے  کم سے کم دس دوستوں کو اس کا لنک ضرور  شئیر کریں۔تاکہ اس سے آپ کے  بہت سارے دوسرے دوستوں کا فائدہ ہوسکے۔



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422

GRADE 11 - BIOLOGY CHAPTER NO.03 Enzymes

GRADE 11 - BIOLOGY CHAPTER NO.03 Enzymes

1 / 73

The optimum temperaure for enzyme to work at maximum rate in human is:

2 / 73

Competitive inhibitors are

3 / 73

5.5 is the optimum pH value for the enzyme

4 / 73

Enzyme is highly specific because of:

5 / 73

The substance that sometimes acts as a source of chemical energy helping to drive the reaction that would otherwise be difficult or impossible

6 / 73

The optimum pH of pancreatic lipase is:

7 / 73

The inhibitor which may destroy the globular structure of enzyme:

8 / 73

NAD is an example of:

9 / 73

The non proteins part of an enzyme is

10 / 73

The optimu pH of Salivary amylase is :

11 / 73

Enzyme lowers down the energy of :

12 / 73

An activated enzyme consisting of polypeptide chain and a cofactor is known as

13 / 73

If non - proteins part of the enzyme is loosely attached to the protein part it is known as

14 / 73

The optimum pH of the enzyme Arginase is

15 / 73

An activated enzyme consists of polypeptide chain and -------:

16 / 73

Which property does not belong to cofactor:

17 / 73

Enzyme required during ------ are present in dissolved form in cytosol:

18 / 73

Inhibitors

19 / 73

How catalytic site becomes activated:

20 / 73

Active site of an enzyme consists of

21 / 73

Poisons like cyanide, antibiotics, anti-metabolites and some drugs are examples of :

22 / 73

The optimum temperator of human body enzymes is

23 / 73

A little change in PH may leads to change

24 / 73

The active site of an enzyme

25 / 73

The optimum pH for pancreatic lipase is

26 / 73

The activation energy of the reaction is lowered by

27 / 73

A 3- dimensional cavity bearing a specific charge:

28 / 73

Enzyme denaturation resulted due to :

29 / 73

One of the followings is competitive in inbitor

30 / 73

According to lock and key model active site is used only as a -----:

31 / 73

9.70 is the optimum pH for:

32 / 73

Lock and key model was proposed by

33 / 73

The optimum pH for enzyme arginase is :

34 / 73

Induce fit model was proposed by

35 / 73

Irreversible inhibitors

36 / 73

The catalytic activity of an enzyme is restircted to its small portion called

37 / 73

Any factor which can alter the chemistry and ----- of an enzyme and affect ats rare of catalysis:

38 / 73

The essential raw materials frim which the coenzymes are made are

39 / 73

Coenzymes are closely related to :

40 / 73

The optimum pH of Enterokinase is :

41 / 73

Pepsinogen is

42 / 73

According to Lock and Key Model, the active site is _________:

43 / 73

Which inhibitor is able to make an El complex but not a product:

44 / 73

Lock and key model was modified by

45 / 73

The enzymes involved in the synthesis of proteins are integral part of

46 / 73

Which one is the essential raq material for coenzymes?

47 / 73

The enzyme with optimum pH=7.6 is :

48 / 73

The bio reactions catalysed by enzymes

49 / 73

The reversible inhibitors usually constitue

50 / 73

If you add more substrate to already occurring enzymatic reaction and it has no effect on the rate iof reaction, What is the term given for this situation;

51 / 73

The optimum pH of, enzyme pepsin is:

52 / 73

Which statement about enzymes is not true

53 / 73

The Biological active proteins are

54 / 73

Rate of an enzymatic reaction directly depends on :

55 / 73

Optimum pH for Sucrase is:

56 / 73

The rate of an enzyme - catalyzed reaction

57 / 73

The normal pH of Human Blood is:

58 / 73

The optimum temperator of most of the enzymes of our body is

59 / 73

Most of the enzymes are

60 / 73

The detachable cofactor of an enzyme is known as

61 / 73

The ptimum pH for chymotrypsin is

62 / 73

Reversible inhibitors form weak linkages with the :

63 / 73

Three dimensional globular protein is :

64 / 73

If non-protein Part is loosely attached to protein, it is known as:

65 / 73

The rate enzymes - catalyzed reaction

66 / 73

An activated enzyme consisting of polypeptide chain and a co-factor is called :

67 / 73

Which of the following enzyme works efficiently at the alkaline pH

68 / 73

The vitamins are essential raq material for the synthesis of:

69 / 73

If the non-protein part of Enzyme is covalently bondend then it is called

70 / 73

All enzymes are

71 / 73

The detachable co-factor is called activator if it is

72 / 73

The rate of reaction of enzyme directly depends upon

73 / 73

Non-detatchable co-factor is

Your score is

The average score is 48%

0%



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