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rRNA

Compunds stru...

Question

Compunds structurally similar to substrate and inducing enzyme synthesis are

A

Constitutive enzymes

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B

Gratuitous inducer

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C

Coordinated inducers

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D

None of the above

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Solution

The correct option is B Gratuitous inducer
Gratuitous inducers resemble authentic inducers of transcription but are not substrates for the induced enzymes. It can initiate transcription when the original inducer is absent. Iso-proppylthiogalactoside (IPTG) is used as an inducer in the lac operon when the lactose and allolactose are used up. It acts as non metabolized inducer.
So, the correct answer is option B.

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Similar questions

Q. Which among the following are compounds structurally similar to substrate and inducing enzyme synthesis?

Q. The binding of the substrate induces the enzyme to alter its shape fitting more tightly around the substrate.

Q. Arrange the steps of catalytic action of an enzyme in order and choose the right option.

(i)

Enzyme releases products of reaction and the enzyme is free to bind to another substrate.

(i i)

Active site of enzyme is in close proximity of substrate and breaks the chemical bonds of substrate.

(i i i)

Binding of substrate induces enzyme to alter its shape fitting more tightly around substrate.

(i v)

Substrate binds to active site of enzyme fitting into active site.

Q. Identify the wrong statemets.

(a)

The substrate binds to active site of enzyme and not fitting into active site

(b)

The binding of substrate induces the enzyme to alter its shape

(c)

Chemical bonds of substrate break down not to form new enzyme-product complex

(d)

The enzyme releases the products of the reaction and runs through catalytic cycle once again

Q. Identify the wrong statements:

(A) The substrate binds to the active site of the enzyme and not fitting into the active site.
(B) The binding of the substrate induces the enzyme to alter its shape.
(C) Chemical bonds of the substrate does not break down to form new enzyme-product complex.
(D) The enzyme releases the reaction and runs through the catalytic cycle once again.

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