Question # 1

Soyabeans have been made resistant to a common

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Insecticide

Herbicide

Fungicide

Pesticide

The enzyme that works best at intermediate pH is

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Pepsin

Chymotrypsin

Sucrase

Pancreatic lipase

If non protein part is covalently bonded to the protein part of enzyme, it is known as

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Coenzyme

Prosthetic group

Activator

Cofactor

If substrate concentration is unlimited, rate of enzyme action becomes

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Inversely proportional to enzyme concentration

Directly proportional to enzyme concentration

Directly proportional to substrate Concentration

Inversely proportional to substrate

Concentration

Enzyme works to its maximum capacity

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At high temperature

At low temperature

At moderate temperature

At optimum temperature

Which one of the following enzymes have slightly acidic pH as optimum pH?

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Sucrase

Enterokinase

Pepsin

Catalase

Change in temperature from 30o C to 40o C in human body will cause ____ in rate of reaction

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Increase

Decrease

First increase then decrease

First increase then constant

The term enzyme was coined from a Greek word which means

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In yeast

In grapes

In apple

In bacteria

The specificity of enzymes is due to their

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High molecular weight

pH sensitivity

Hydrogen bonding

Surface configuration

Succinic acid is the ____ of succinic dehydrogenase which undergoes____

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Active site, reduction

Prosthetic group, reduction

Substrate, oxidation

Substrate, reduction

Which of the following is an example of ribozyme

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Aminopeptidase

Pancreatic lipase

Peptidyl transferase

Cytochrome oxidase

Inorganic ions can play a role of ¬¬¬¬¬¬¬______ in enzyme catalysis

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Coenzyme

Inhibitor

Apo enzyme

Cofactor

Function of succinic dehydrogenase is aided by

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Metal ion

Vitamin

NAD

FAD

Slight change in pH can cause

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Denaturation

Crystallization

Ionization

All

By adding _______in neutral pH, we get the optimum pH of pancreatic lipase

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1

2

3

4

Formation of ES complex activates the______ site of an enzyme

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Active

Binding

Catalytic

Allosteric

Allosteric enzymes have ___ major sites

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1

2

3

4

Pick up the correct statement according to induced fit model of enzyme action

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Enzyme induces changes in substrate structure

Substrate induces changes in enzyme structure

Active site of enzyme is a rigid structure

Active site of enzyme is used as a template +

Prosthetic groups are

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Radicals

Inorganic molecules

Organic molecules

Metal ions

Which of the following helps in recognition of substrate

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Active site

Catalytic site

Binding site

All

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

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MDCAT Biology Chapter 7 Enzymes Online Test MCQs With Answers

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