Match the following lists. List-I List-II List-III A Coenzymes are organic compound i No structure similarities I Ribose-5 phosphate isomerase B Isomerases ii Differ from inorganic catalysis II During catalysis C Non-competitive enzyme inhibition iii Catalyzing interconversion of optical positional isomers III Operates at high temperatures also D Enzyme catalysts iv With the apoenzyme only as a transient IV Metal ion of copper The correct match is:

A B C D iv, II iii, I i, IV ii, III

A B C D iii, III ii, I iv, II i, IV

A B C D iv, II iii, I i, III ii, IV

A B C D iii, III ii, IV iv, I iv, I

EASY

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Identify the incorrect statement out of the following:

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Important Questions on Enzymes

MEDIUM

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Solid and dotted lines represent the activities of pepsin and salivary amylase enzymes of the digestive tract, respectively. Which one of the following graphs best represents their activity vs pH?

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

The formation of the Enzyme - Substrate complex is essential for

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Serine proteases are called so because they

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Match the following?

Enzymes		Functions
(a)	Lyases	(i)	Oxido reduction
(b)	Isomerases	(ii)	Link compounds
(c)	Dehydrogenases	(iii)	Transfer of group
(d)	Ligases	(iv)	Interconversion
		(v)	Removal of groups

HARD

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Given below are the four schematics that describe the dependence of the rate of an enzymatic reaction on temperature. Which of the following combination is true for thermophilic and psychrophilic organisms?

Question Image

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Identify the labelled parts $1, 2, 3, 4$ in the concept of activation energy shown in the below diagram?

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HARD

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Study the following

(I)	$K_{m}$ value	Affinity of the enzyme	Inverse measure enzyme affinity
(II)	Hydrolases	$P - O$ bonds	Linking $2$ compounds
(III)	Transferases	Transfer of a group	Inhibitor of reaction
(IV)	Emil Fisher	Lock and key hypothesis	Formation of ES complex

The correct combinations are

HARD

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Write briefly about enzyme inhibitors.

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Co-enzymes are components of an enzyme complex which are necessary for its function. Which of these is a known co-enzyme?

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Which one of the following statements is correct, with reference to enzymes?

MEDIUM

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Match the enzymes in Column I with their respective biochemical reactions in column II. Choose the correct combination from below

Column I	Column II
(P) Transaminases	(i) Removal of a phosphoryl group from a specific amino acid
(Q) Protein Kinases	(ii) Removal of α-amino group from a specific amino acid
(R) Protein Phosphatases	(iii) Addition of phosphoryl group to a specific amino acid
(S) Dehydrogenases	(iv) Interconversion of optical isomers
	(v) Oxidation and reduction of substrates

MEDIUM

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Which of the following describes the given graph

Question Image

MEDIUM

Biology>Plant Physiology>Enzymes>Classification of Enzymes

What is enzyme? Write the name of two enzymes?

MEDIUM

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Match the following lists.

	List-I		List-II		List-III
A	Coenzymes are organic compound	i	No structure similarities	I	Ribose-5 phosphate isomerase
B	Isomerases	ii	Differ from inorganic catalysis	II	During catalysis
C	Non-competitive enzyme inhibition	iii	Catalyzing interconversion of optical positional isomers	III	Operates at high temperatures also
D	Enzyme catalysts	iv	With the apoenzyme only as a transient	IV	Metal ion of copper

The correct match is:

HARD

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Explain different types of co-factors.

HARD

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Write briefly about enzyme inhibitors.

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Bottled fruit juices brought from the market are clearer as compared to those made at home because the bottled juices are clarified by the use of _____

MEDIUM

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Select the option which is not correct with respect to enzyme action:

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

A non-proteinaceous enzyme is:

EASY

Biology>Plant Physiology>Enzymes>Classification of Enzymes

Which ONE of the following coenzymes is required for the conversion of

L -

alanine to a racemic mixture of

D -

and

L -

alanine?

Identify the incorrect statement out of the following:

Important Questions on Enzymes

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