Biology - Mock Test 120

Question 1191

Beadle and Tatum showed that each kind of mutant bread mould they studied lacked a specific enzyme. Their experiments demonstrated that ?

A) Cells need specific enzymes in order to function B) Genes are made of DNA C) Genes carry information for making proteins D) Enzymes are required to repair damaged DNA information

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Question 1192

The first enzyme to be purified and crystallized was ?

A) Urease B) Diastase C) Insulin D) Zymase

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Question 1193

NADP+ is ?

A) Enzyme activator B) Ion carrier C) Hydrogen acceptor D) Electron acceptor

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Question 1194

One common example of feedback inhibition would be ______?

A) Allosteric inhibition of hexokinase by glucose-6-phosphate B) Reaction between succinic dehydrogenase and succinic acid C) Cyanide and cytochrome reaction D) Sulfa drugs and folic acid synthesis in bacteria

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Question 1195

Km value of enzyme is substrate concentration at ?

A) 1/2 V max B) 2 V max C) 1/4 V max D) 4 V max

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Question 1196

A protein having both structural and enzymatic traits is?

A) Collagen B) Trypsin C) Myosin D) Actin

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Question 1197

In a cell, digestive enzymes mostly occur in ?

A) Mitochondria B) Lysosomes C) Ribosome D) Plastids

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Question 1198

Hydrolysis of starch occurs with the help of ?

A) Peptidase B) Amylase C) Sucrose D) Lipase

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Question 1199

Which of the following influence feedback inhibition of enzyme?

A) End product B) External factors C) Enzyme D) Substrate

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Question 1200

Enzymes, vitamins and hormones are common in ?

A) Enhancing oxidative metabolism B) Being synthesised in the body of organisms C) Being proteinaceous D) Regulating metabolism

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