9th Biology Chapter # 6 All Punjab Board Papers | 5 Years old Board Papers MCQs questions | Repeated MCQs questions in all Board Papers - E-Learn

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9th Biology Chapter # 6 All Punjab Board Papers | 5 Years old Board Papers MCQs questions | Repeated MCQs questions in all Board Papers

   CHAPTER No. 6

1.     Which Scientist gave the concept of metabolism first?                     

(A) Ibn-e-Nafees          (B) Jabber Bin Hayan  (C)Newton                   (D) William

2.     Metabolism is derived from Greek word meaning                 

(A)Division                   (B) Change                  (C) Deduction              (D) Matter

3.     In which biochemical reaction energy is released:

(A) anabolism              (B) metabolism           (C) catabolism             (D) Newton

4.     Molecules at which enzymes act are called.                            

(A) Catalyst                 (B) Substrates              (C) Products                (D) Charges

5.     The kind of protein which catalysis a biochemical reaction is called:

(A) Enzymes                (B) Harmones              (C) Co- enzymes          (D) None of these

6.     In metabolism works as catalyst.

(A) Enzyme      (B) Vitamins                            (C) Protein                   (D) Lipids

7.     Who first used the term Enzyme?                                            

(A) Zacharias Janseen (B) Robert Brown        (C) Winhelm Kuhne     (D) Louis Pasteur

8.     To which category molecules Enzymes belong.                                  

(A) Carbohydrates       (B) Proteins                 (C) Lipids                     (D) Nucleic acid

9.     Almost all enzymes are:                                                             

(A) Protein                   (B) Vitamin                  (C) Fatty acid               (D) Minerals

10. Enzymes are made up of:                                                                       

(A) Fatty acid               (B) Nucleic acid           (C) Carbohydrates       (D) Amino acid

11. If organic cofactors are loosely attached with enzymes, they are called.

(A) Prosthetic group    (B) co-enyzmes           (C) active site              (D) activators

12. Prosthetic groups are:

(A) Required by all enzymes                           (B) Loosely attached with enzymes

(C) Proteins in nature                                     (D) tightly bound to enzymes.

13. The Catalytic Region on Enzyme is called.

(A) Metabotic Site       (B) Co-enzyme                        (C) Cofactor                (D) Active Site

14. Which of the following Vitamins work as co-enzyme?                       

(A) Vitamin B              (B) Vitamin D              (C) Vitamin C              (D) Riboflavin

15. Enzyme used for the removal of protein Stains from clothes is:

(A) Protease                (B) Lipase                    (C) Amylase                 (D) Pepsin

16. Enzyme used for cleaning utensils is_____________              

(A)   amylase                 (B) trypsin                   (C) lipase                     (D) tylon

17. Protease enzyme are used for removal of ____ stains from cloths

(A)   Fat                        (B) protein                   (C) starch                    (D) oil

18. Biological detergent is                                                               

(A)   pepsin                    (B) protease                (C) glycogen                (D) trypsin

19. What is true about enzymes?

(A)   They make biological reaction to proceed spontaneously

(B)   They lower the activation energy of a reaction

(C)   They are not very specific in their choice of substrate

(D)  They are needed in large quantities

20. The optimum temperature for the maximum working speed of humanenzyme                

(A) 27oC                       (B) 35oC                       (C) 0oC                         (D) 37oC

21. In 1894 proposed lock and key model.

(A) Aristotle                 (B) Robert Hooke        (C) Emil Fischer           (D) Louis Pasteur

22. Lock and key model of enzyme action was proposed by:      

(A) Emil Fischer           (B) Daniel Koshland    (C) Winhelm                (D)Calvin

23. When did Daniel Koshland purposed induce fit Model?

(A) 1894                      (B) 1958                      (C) 1968                      (D) 1985

24. Who proposed the induced fit model of enzyme action?

(A)  Emil Fischer                                              (B) Daniel Koshland               

(C) Ibn-e-Nafees                                              (D) Jabir Bin Hayan

25. Lipase enzyme act on only.                   

(A) carbohydrates       (B)proteins                  (C)lipids                       (D)starch

26. Enzyme lipase acts on lipids and convert them into:

(A) Acetic acid                                                 (B) lactic acid             

(C)   Fatty acids and glycerols                         (D) Ascorbic acid

27. Starch is broken down by an enzyme called:                          

(A) Lipase                    (B) Pepsin                    (C) Amylase                 (D) None of these

28. Which group of enzymes break up starches and other carbohydrates?

(A)lipases                    (B)proteases                (C) amylases               (D) pepsin

29. Enzyme Amylase is used in.

(A) Cloth washing        (B)Saponification        (C) Coluring                 (D) Dish wash

30. Which enzyme acts on lipids?

(A)   protease                (B) lipase                     (C) amylase                 (D) pepsin

31. Enzyme digesting starch:

(A)   lipase                     (B) amylase                 (C) protease                (D) trypsin

Answers

1

2

3

4

5

6

7

8

9

10

11

12

13

14

A

B

C

B

A

A

C

B

A

D

B

D

D

D

15

16

17

18

19

20

21

22

23

24

25

26

27

28

A

A

B

B

B

D

C

A

B

B

C

C

C

C

29

30

31

 

D

B

B

 

 


 

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