FSC Part 1 Biology Chapter 3 Enzymes MCQs,Short and Long Questions

FSC PART 1 BIOLOGY CHAPTER 3

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FSC PART 1 BIOLOGY CHAPTER 3 Important Long Questions 

1.         Enzymes are produced in inactive form by the cell and enclosed in membrane bound structure called

(a) Mesosomes           

(b)  Lysosomes           

(c) Peroxisomes                     

(d) Dictyosomes

2.         The optimum pH for sucrase enzyme is

(a) 2                 (b) 4.50                     

(c) 5.50            (d) 6.80

3.         The essential raw materials from which co-enzymes made are

(a) Metal Ions (b) Vitamins               

(c) Proteins     (d) Carbohydrates

4.         Mechanism of enzyme active is referred to as

(a) Activation energy                                      

(b) Catalysis

(c)  Enzyme specifity                                    

(d) Denaturation

5.         An activated enzyme enzyme made of plypeptide chain & co-factor is

(a) Substrate               

(b) Co-enzyme             

(c)  Apoenzyme                     

(d) Holoenzyme

6.         The reversible inhibitors usually constitute

(a) Strong linkage with enzyme                    

(b) No linkage with enzyme

(c) Weak linkage with enzyme                     

(d) Medium linkage

C).       Answer Any 6 Short Questions Out of  8                                                                           

1.         Define catalysis?

2.         Describe lock & key model of enzyme action

3.         How do low & High temp affects the enzyme action

4.         What is the effect of cyanides, antibodies &  antimetabolites on enzyme?

5.         What would happen to enzyme-controlled reaction if enzymes are absent.

6.         How an enzyme recognizes its substrate?

7.         In which way the change in PH affect the enzyme activity.

8.         What is optimum Ph of salivary amylase?

Subjective.                                        

(a)  What are enzymes? Give their characteristics.

(b)  Give the two ideas proposed about the formation of enzyme substrate complex.

(c)  Define Cofactor, poenzyme, Substrate, Competitive inhibitor.

(d) What are inhibitors? How do they effect enzyme? Give their types.

#Fsc part 1 Biology chapter 3

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