Biology 9 Chapter 6 MCQs Tests

In this post, we have prepared 2 MCQs tests of Federal Board Biology 9 Chapter 6 MCQs Tests. For more Class 9 Biology MCQs Tests visit this page.

Biology 9 Chapter 6 MCQs Tests

Practice MCQs Test No 1

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Class 9 Biology
Chapter 6
Practice MCQs Test No 1

1 / 15

Enzymes lower the activation energy in the ways:

All of these

They may lower activation energy by bringing substrates in the correct orientation to react

Some enzymes do so by disrupting the charge distribution on substrates

They may alter the shape of substrate

2 / 15

Almost all the enzymes are:

Carbohydrates

Fats

Protein

Vitamins

3 / 15

The catalytic region of enzyme is called:

Cofactor

Prosthetic group

Coenzyme

Active site

4 / 15

The term Metabolism is derived from the Greek words means:

Division

Change

Split

Break

5 / 15

Who first time used the term enzyme?

Emil Fischer

Winhelm Kuhne

lbn-e-Nafees

Daniel Koshland

6 / 15

When the term enzyme was used for the first time?

1878

1876

1880

1874

7 / 15

The term metabolism is derived from:

French word

Italian word

Greek word

Latin Word

8 / 15

If organic cofactors are tightly bound to enzyme, they are called:

Prosthetic groups

None of these

Coenzymes

Both a & b

9 / 15

The concept of metabolism was first of all given by:

Winhelm Kuhne

Daniel Koshland

Ibn-e-Nafees

Emil Fischer

10 / 15

To which group of molecules enzymes belong?

Carbohydrates

Proteins

Nucleic acids

Lipids

11 / 15

Which one is an organic cofactor?

Both a & b

Flavin

Heme

None of these

12 / 15

The molecules on which enzymes act are called:

Substrates

Enzyme substrates complex

Proteins

Co-enzyme

13 / 15

Chemically enzymes are:

Carbohydrates

Fats

Protein

Lipids

14 / 15

If organic cofactors are loosely attached with enzyme, they are called:

Prosthetic groups

None of these

Coenzymes

Both a & b

15 / 15

Which of the following is not true about enzymes?

They act as biocatalysts

Enzymes speed up biochemical reactions

They increase the activation energy

They lower the activation energy

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Practice MCQs Test No 2

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Class 9 Biology
Chapter 6
Practice MCQs Test No 2

1 / 14

Starch is broken down by an enzyme called:

All of these

Lipase

Pepsin

Amylase

2 / 14

When there is an increase in temperature, the rate of enzyme catalyzed reactions:

All of these

Decreases

Increases

Remains constant

3 / 14

Which of the following vitamins act as coenzyme?

Thiamine

Folic acid

All of these

Riboflavin

4 / 14

Which of the following is not true about induced fit model?

Active site is molded into the required shape.

According to this model active site is not rigid structure

It is more acceptable model

This model explains specificity of enzymes

5 / 14

When was lock and key model proposed?

1896

1894

1890

1898

6 / 14

The optimum temperature for the maximum working speed of human enzymes is:

39°C

35°C

43°C

37°C

7 / 14

Which enzymes are used in dish washing to remove resistant starch residues?

All of these

Amylase

Lipase

Protease

8 / 14

The enzyme that acts on lipids:

Protease

Pepsin

Lipase

Amylase

9 / 14

Number of discovered enzymes so far:

2000

1500

1000

2500

10 / 14

Who proposed lock and key model?

Emil Fischer

Daniel Koshland

Ibn-e-Nafees

Winhelm Kuhne

11 / 14

Who proposed induced-fit model?

Emil Fischer

Winhelm Kuhne

Daniel Koshland

Ibn-e-Nafees

12 / 14

When was induced-fit model proposed?

1956

1954

1952

1958

13 / 14

The enzymes used for the removal of protein stains from clothes?

All of these

Amylase

Lipase

Protease

14 / 14

The peptide bonds in proteins are broken down by:

All of these

Amylase

Protease

Lipase

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