Which of the following statements about enzymes is true


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Which of the following statements about enzymes are correct ?

(i) Enzymes do not alter the overall change in free energy for a reaction.
(ii) Enzymes are proteins whose three dimensional energy.
(iii) Enzymes speed up reactions by lowering activation energy.
(iv) Enzymes are highly specific for reactions.
(v) The energy input needed to start a chemical reaction is called activation energy.

Answered by admin @



Answer:

ANSWER

As properties of an enzyme are: 

(i) They don't initiate the catalysis by accelerating the rate of catalysis by lowering the activation energy.

(ii) A particular enzyme attacks on a particular substrate (it fits like a key in the lock).

(iii) Any enzyme which breaks the long chain molecules of proteins into shorter fragments (peptides) and eventually into their components, amino acids called proteolytic enzyme.

Pepsin is such an example


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