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Biology 11 chapter 3 important mcqs, short and long questions

Learn Biology 11 chapter 3 enzymes important mcqs, short and long questions. These important biology 11 mcqs, short and long questions are collected by going through different past papers of all Punjab Board Pakistan.

Biology 11 chapter 3



Why are these questions important?

These Questions are taken from past papers of Biology Class 11. These questions are top repeated of in previous papers of Biology 11 of all Punjab boards as;

*      Bahawalpur Board

*      D.G.Khan Board

*      Faisalabad Board

*      Gujranwala Board

*      Lahore Board

*      Multan Board

*      Rawalpindi Board

Content is created and designed with intense care and diligence. Here is only the most important MCQ, short questions and long questions of Biology class 11 chapter 3 Enzymes.

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You can easily download in pdf format or view Biology class 11 chapter mcqs, short questions and long questions  online. You can easily print these files in simple way. Here you find Bilgy class 11 Chapter 3 enzymes  important mcqs, short and long questions. By Preparing these important questions, you will achieve splendid marks in Biology class 11. This content is very helpful for weak students and also helpful for those students that are better at Biology 11 exam preparation. These Questions are based on the current Biology 11 syllabus according to Punjab Textbook Board.

Biology class 11 chapter 3


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About This Chapter

Chapter 3 enzymes Biology class 11 introduces the students Enzymes. Students learn characteristics of enzymes. Students learn importance of water. Students learn about mechanism of enzymes action means catalysis (Lock and key model and Induced fit model). Students learn about factors affecting the rate of enzyme action. This Post "Biology 11 chapter 3 important mcqs, short and long questions" covers all important mcqs, short and long questions related to important  topics of this chapter.

👉Imp MCQs - Biology Class 11 CH # 3

1. Non- protein part of an enzyme is known as
(A) Co-factor
(B) Prosthetic group
(C) Activator
(D) None of these

(A) Co-factor


2. Optimum pH of pepsin is 

(A) 2
(B) 3.5
(C) 5
(D) 6

(A) 2


3. If non protein part is covalently bonded to enzyme, then it is known as:

(A) Coenzyme
(B) Prosthetic group
(C) Apo enzyme
(D) Activator

(B) Prosthetic group


4. Coenzyme is closely related to

(A) Proteins 
(B) Lipids
(C) Vitamins
(D) Carbohydrates

(C) Vitamins


5. All enzymes are globular

(A) Proteins
(B) Lipids
(C) Carbohydrates
(D) None of these

(A) Proteins


6. Lock and key model of enzyme action is proposed by:

(A) Koshland
(B) Emil Fisher
(C) Edward Jenner
(D) Lorenz Oaken

(B) Emil Fisher


7. Ionization of amino acids at active site can be change by a slight change in

(A) Temperature
(B) Substrate Conc.
(C) pH
(D) Enzyme Conc.

(C) pH


8. Choose an inactive form of enzyme:

(A) Pepsinogen
(B) Trypsinogen
(C) None of these
(D) Both A & B

(D) Both A & B


9. They form weak linkages with enzymes:

(A) Reversible inhibitors
(B) Irreversible inhibitors
(C) Both
(D) None

(A) Reversible inhibitors


10. Choose which is powerful protein digesting enzyme?

(A) Kinase
(B) Pepsin
(C) Lipase
(D) Ptyalin

(B) Pepsin

Next, there is  PDF containing Biology class 11 chapter 1 important Short and Long Questions covers all important topics of this chapter.



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👉Other Chapters (PDF) of Biology Class 11 Punjab Textbook Board

Chapter 2
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Chapter 14

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