Biology - Mock Test 119

Question 1181

Turn over number of an enzyme is dependent upon ?

A) Size of enzyme B) Molecular weight of enzyme C) Active sites D) Concentration of substrate

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Question 1182

The polypeptide or protein part of the enzyme is called ?

A) Apoenzyme B) Holoenzyme C) Prosthetic group D) Zymogen

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Question 1183

The non protein part of an enzyme is known as ?

A) Holoenzyme B) Vitamin C) Apoenzyme D) Prosthetic group

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Question 1184

The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodule is ?

A) nitrogenase B) nitrate reductase C) nitrite reductase D) all of the above

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Question 1185

The activity of succinate dehydrogenase is inhibited by ?

A) Glycolate B) Pyruvate C) Malonate D) Phosphoglycerate

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Question 1186

Ribozyme is ?

A) RNA without phosphate B) RNA with sugar C) RNA with enzyme activity D) RNA with extra phosphate

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Question 1187

Restriction endonucleases are enzymes which ?

A) Remove nucleotides from the ends of the DNA molecule B) Make cuts at specific positions within the DNA molecule C) Recognize a specific nucleotide sequence for binding of DNA ligase D) Restrict the action of the enzyme DNA polymerase

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Question 1188

Restriction endonuclease is employed for ?

A) Cutting RNA B) Cutting single stranded DNA C) Cutting double stranded DNA D) Joining strands of DNA

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Question 1189

Most of the members of vitamin B complex act as ?

A) Cofactor B) Coenzyme C) Prosthetic group D) Apoenzyme

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Question 1190

Many enzymes are secreted in inactive form to protect ?

A) Cell Membrane B) Mitochondria C) Cell proteins D) Cell DNA

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