20. Which one of the following statements is incorrect about enzyme catalysis? (1) Enzymes are least reactive at optimum temperature (2) Enzymes are mostly proteinous in nature (3) Enzyme action is specific (4) Enzymes are denaturated by ultraviolet rays and at high temperature

20. Which one of the following statements is incorrect about enzyme catalysis?
(1) Enzymes are least reactive at optimum temperature
(2) Enzymes are mostly proteinous in nature
(3) Enzyme action is specific
(4) Enzymes are denaturated by ultraviolet rays and at high temperature
by

1 Answer

Answer :

Enzymes are least reactive at optimum temperature
by

Related questions

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Last Answer : (b) Enzymes are mostly proteins but some are lipids also.

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Which of the following statements regarding mitochondria is incorrect? (a) Mitochondrial matrix contains single circular DNA molecule and ribosomes. (b) Outer membrane is permeable to monomers of carbohydrates, fats and proteins. (c) Enzymes of electron transport are embedded in outer membrane. (d) Inner membrane is convoluted with infoldings.

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Which of these statements is incorrect ? (1) Enzymes of TCA cycle are present in mitochondrial matrix. (2) Glycolysis occurs in cytosol. (3) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms. (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.

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(4) None of these Explanation: Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in multiple chemical transformations. Catalysts that speed the reaction are called positive catalysts.

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What do you mean by activity and selectivity of catalysis?

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What is meant by induced catalysis ? Give an example.

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Shape-selective catalysis

Description : Shape-selective catalysis

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Mechanism of heterogeneous catalysis

Description : Mechanism of heterogeneous catalysis

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Last Answer : ANSWER: W -- ALKENES

Assetion: Restriction enzymes cut the strand 27 of DNA to produce sticky ends Reason : Stickiness of the ends faciliates the action of the enzyme DNA

Description : Assetion: Restriction enzymes cut the strand 27 of DNA to produce sticky ends Reason : Stickiness of the ends faciliates the action of the enzyme DNA

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Template/lock and key theory of enzyme action is supported by (A) Enzymes speed up reaction (B) Enzymes occur in living beings and speed up certain reactions (C) Enzymes determine the direction of reaction (D) Compounds similar to substrate inhibit enzyme activity

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The pH at which an enzyme has maximum activity is known as (A) Isoelectric pH (B) Optimum pH (C) Low pH (D) High pH

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What is the optimum pH of usual enzymes?

Description : What is the optimum pH of usual enzymes?

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Which one of the following statements is incorrect? (a) The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex. (b) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate. (c) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex. (d) In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.

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Last Answer : (b) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate

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Which type of glass can cut off ultraviolet rays? -Do You Know?

Description : Which type of glass can cut off ultraviolet rays? -Do You Know?

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Which layer of the atmosphere protects us from ultraviolet rays coming from the Sun? -General Knowledge

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