Question # 1

Enzyme works to its maximum capacity

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At high temperature

At low temperature

At moderate temperature

At optimum temperature

Potentially damaging enzymes are produced in

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Active form

Inactive form

Abundant quantity

Minor quantity

Flavin adenine dinucleotide is a

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Prosthetic group

Activator

Coenzyme

Inhibitor

Nicotinamide adenine dinucleotide is an example of

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Cofactor

Coenzyme

Prosthetic group

Nucleotide

Function of succinic dehydrogenase is aided by

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Metal ion

Vitamin

NAD

FAD

Succinic acid is the ____ of succinic dehydrogenase which undergoes____

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Active site, reduction

Prosthetic group, reduction

Substrate, oxidation

Substrate, reduction

______form the raw material for coenzyme

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Nucleic acid

Lipids

Vitamins

Proteins

The enzyme that works best at intermediate pH is

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Pepsin

Chymotrypsin

Sucrase

Pancreatic lipase

Many enzymes are simply dissolved in the

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Nucleoplasm

Stroma of chloroplast

Cytoplasm

Matrix of mitochondria

Prosthetic groups are

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Radicals

Inorganic molecules

Organic molecules

Metal ions

Which of the following is an example of ribozyme

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Aminopeptidase

Pancreatic lipase

Peptidyl transferase

Cytochrome oxidase

At high substrate level, all the active sites of enzyme are

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Destroyed

Available

Degenerated

Occupied

The competitive inhibitor competes with the

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Enzyme

Cofactor

Substrate

Coenzyme

The inhibitor having structural similarity with substrate is

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Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Noncompetitive inhibitor

Optimum pH of all human enzymes is

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Variable

Same

Acidic

Alkaline

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

Which of the following kind of inhibitors don’t compete for active site of enzyme

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Irreversible competitive

Reversible competitive

Reversible non competitive

Both b and c

Slight change in pH can cause

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Denaturation

Crystallization

Ionization

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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