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Chapter 3 Model Paper (11th)

The document is an examination paper for Class 11 Biology at Ravian High School Kot Mithan, focusing on enzymes and their functions. It includes multiple-choice questions and short answer questions, covering topics such as enzyme activity, inhibitors, and biochemical structures. The total marks for the paper are 30, and students are warned against cheating.

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Jalil Minhas
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33 views1 page

Chapter 3 Model Paper (11th)

The document is an examination paper for Class 11 Biology at Ravian High School Kot Mithan, focusing on enzymes and their functions. It includes multiple-choice questions and short answer questions, covering topics such as enzyme activity, inhibitors, and biochemical structures. The total marks for the paper are 30, and students are warned against cheating.

Uploaded by

Jalil Minhas
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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The Ravian High School Kot Mithan

Biology (Chapter 3) (Complete) Time: 40 min


Class 11 Remover not allowed Cheating will cancel your paper Marks: 30

Name____________________________________
Q.No.1: Select the Correct answer. (14x1=14)
1. Which requires aqueous medium for their activity?
(a) Proteins (b) Co enzymes (c) Activators (d) Enzymes
2. Which structure act as a bridge between enzymes and substrate?
(a) Cofactor (b) Binding site (c) Apoenzyme (d) Inhibitor
3. Which of the following has pH=9?
(a) Pancreatic lipase (b) Pancreatic amylase (c) Chymotrypsin (d) Arginase
4. An inhibitor which may physically block the active site of enzyme is called?
(a) Reversible (b) competitive (c) irreversible (d) non competitive
5. The rate of enzymes reaction doubles for each------ rise in temperature?
(a) 100C (b) 150C (c) 200C (d) 250C
6. The raw material from which coenzymes are made?
(a) Proteins (b) Nucleic acids (c) Carbohydrates (d) Vitamins
7. Enzymes lower down the energy of?
(a) Kinetic (b) Activation (c) Potential (d) Ionic
8. The optimum pH for arginase is?
(a) 9.70 (b) 8.70 (c) 9.00 (d) 2.00
9. Enzymes involved in the synthesis of protein are integral part of?
(a) Mitochondria (b) Ribosomes (c) Cytoplasm (d) Nucleolus
10. Enzymes important for cellular respiration are found in?
(a) Mitochondria (b) Ribosomes (c) Cytoplasm (d) Nucleolus
11. Enzymes important for photosynthesis are found in?
(a) Mitochondria (b) Ribosomes (c) Cytoplasm (d) Chloroplast
12. Lock and key model was proposed by?
(a) Emil Fischer (b) Lorenz Oken (c) Rudolph Virchow (d) Koshland
13. Induced fit model was proposed by?
(a) Emil Fischer (b) Lorenz Oken (c) Rudolph Virchow (d) Koshland
14. The optimum pH for sucrase enzyme is?
(a) 4.50 (b) 5.10 (c) 4.90 (d) 4.83
Q.No.2: Short answers of following questions. (13x2=26)
1. How irreversible inhibitors inhibit the activity of enzyme? 2. Why in human body vitamins are required in
small quantity? 3. Why cofactors are considered necessary for enzyme action? 4. What are reversible inhibitors
and irreversible ? 6. What are esters give their production with an example? 7. What are lipids give two
functions of waxes? 8. Sketch structure of ribofuranose and glucopyranose? 9. Differentiate between Amylose
and Amylopectin starches? 10. Differentiate between peptide bond and glycosidic bond? 11. Define heat
capacity give its advantages? 12. Define heat of vaporization? 13. Differentiate between anabolism and
catabolism?

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