Biology - Comprehensive Mock Test 58

Question 571 Easy

Diastase takes part in digestion of ______ ?

A) Protein B) Starch C) Amino acids D) Fat

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Question 572 Medium

Blocking of enzyme action by blocking its active sites is ?

A) allosteric inhibition B) feedback inhibition C) competitive inhibition D) non-competitive inhibition

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Question 573 Medium

An example of competitive inhibition of an enzyme is the inhibition of ?

A) succinic dehydrogenase by malonic acid B) cytochrome oxidase by cyanide C) hexokinase by glucose-6-phosphate D) carbonic anhydrase by carbon dioxide

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Question 574 Medium

Which of the following is produced with the combination of apoenzyme and coenzyme?

A) Holoenzyme B) Enzyme substrate complex C) Prosthetic group D) Enzyme product complex

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Question 575 Medium

An enzyme that joins the ends of two strands of nucleic acid is ?

A) polymerase B) ligase C) synthetase D) helicase

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Question 576 Easy

The coenzyme is ?

A) often a metal B) always a protein C) often a vitamin D) always an inorganic compound

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Question 577 Easy

The general mechanism is that an enzyme acts by ?

A) reducing the energy of activation B) increasing the energy of activation C) decreasing the pH D) increasing the pH

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Question 578 Medium

The rough endoplasmic reticulum (RER) in the cells are because of the presence of ?

A) Mitochondria associated with ER B) Ribosomes on the surface of ER C) Volutin granules on the surface of ER D) Sulphur granules on the surface of ER

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Question 579 Easy

Polysome is formed by ?

A) Ribosomes attached to each other in a linear arrangement B) Several ribosomes attached to a single mRNA C) Many ribosomes attached to a strand of endoplasmic reticulum D) A ribosome with several subunits

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Question 580 Easy

Vacuole in a plant cell?

A) Lacks membrane and contains water and excretory substances B) Is membrane-bound and contains storage proteins and lipids C) Is membrane-bound and contains water and excretory substances D) Lacks membrane and contains air

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