Question # 1

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

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Sucrase

Enterokinase

Pepsin

Catalase

Allosteric enzymes have ___ major sites

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1

2

3

4

Which of the following is Koshland model

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Active site is rigid

Active site may be molded to précised shape

Position of active site is moveable

None

Many enzymes are simply dissolved in the

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Nucleoplasm

Stroma of chloroplast

Cytoplasm

Matrix of mitochondria

Potentially damaging enzymes are produced in

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Active form

Inactive form

Abundant quantity

Minor quantity

Which of the following is not affected by enzymes

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Nature and properties of end products

Nature and properties of reactants

Speed of biochemical reaction

Efficiency of biochemical reaction

Enzymes cannot work in which of the following

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Aqueous medium

Dry medium

Acidic medium

Alkaline medium

Ribozyme is found in

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Mitochondria

Cytoplasm

Lysosomes

Ribosomes

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

Both ____ and ____ are detachable cofactors

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Apoenzyme, holoenzyme

Activator, coenzyme

Coenzyme, prosthetic group

Prosthetic group, activator

Succinic acid differs from malonic acid by

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OH

CH₂

CH₃

CHO

Flavin adenine dinucleotide is a

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Prosthetic group

Activator

Coenzyme

Inhibitor

The optimum temperature for most of the enzymes in human body is

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37 ^oC

35^oC

37 ^oF

98.6^oC

Following enzymes are indicating the specificity of their action in their names, except

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Sucrase

Amylase

Pepsin

Lipase

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

Optimum pH for digestive enzymes of stomach is

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Highly acidic

Highly alkaline

slightly acidic

slightly alkaline

Prosthetic groups are

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Radicals

Inorganic molecules

Organic molecules

Metal ions

Urine is preferably used as a vehicle for biotechnology product than:

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Blood

Milk

Plasma

Tissue fluid

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

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Coenzyme

Inhibitor

Apo enzyme

Cofactor

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

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

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Destroyed

Available

Degenerated

Occupied

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