Question

PLease answer all... Thank you!

53) An enzyme is (1 pts) an organic catalyst able to change the rate of reaction a protein All of the above are correct. 54) Cyanide is a strong inhibitor of iron-containing enzymes because it binds with iron and deprives the enzyme of its cofactor. This is called O noncompetitive ihibition denaturation O competitive inhibition O constitutive enzymes 55) Enzymes which are produced by the cell only in response to a particular substrate are called 0 isozymes O holoenzymes induced enzymes constitutive enzymes (1 pts) 56) In the genetic control of the lac operon, lactose acts in which of the following ways? i. As a corepressor ii. As a positive control element iii. As a negative control element iv. As a specific inducer statements i., il., and iii. statements i. and ill. statements ii. and iv. statement iv None of the preeciding answers is correct

Answer 1

Q53) An enzyme is an organic molecule and catalyzes the biochemical reactions. therefore they are organic catalysts and speed up the rate of reaction. Chemically they are proteins. therefore the option 'All of the above is correct'

Q54) The binding of cyanide to the cofactor iron is an example of non-competitive inhibition which deprives the enzyme of its catalytic activity due to unavailability of the required cofactor.

Therefore the correct option is Non-competitive inhibition

Q55) The enzymes which are produced by the cell only in response to a particular substrate is called as induced enzymes.

Therefore the correct option is Induced enzymes.

Q56) In the Lac operon, lactose acts as an inducer which switches the operon on when present in the cell.

Therefore the correct option is Statement IV

Thank you