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90
MCQ (Single Correct Answer)

Assertion (A) Sodium chloride is added to precipitate soap after saponification.

Reason (R) Hydrolysis of esters of long chain fatty acids by alkali produces soap in colloidal form.

A
Assertion and reason both are correct statements but reason does not explain assertion.
B
Assertion and reason both are correct and reason explains the assertion.
C
Both assertion and reason are wrong statements.
D
Assertion is correct statement reason is wrong statement.
E
Assertion is wrong statement reason is correct statement.
91
MCQ (Single Correct Answer)

Assertion (A) Competitive inhibitors compete with natural substrate for their attachment on the active sites of enzymes.

Reason (R) In competitive inhibition, inhibitor binds to the allosteric site of the enzyme.

A
Assertion and reason both are correct statements but reason does not explain assertion.
B
Assertion and reason both are correct and reason explains the assertion.
C
Both assertion and reason are wrong statements.
D
Assertion is correct statement reason is wrong statement.
E
Assertion is wrong statement reason is correct statement.
92
MCQ (Single Correct Answer)

Assertion (A) Non-competitive inhibitor inhibits the catalytic activity of enzyme by binding with its active site.

Reason (R) Non-competitive inhibitor changes the shape of the active site in such a way that substrate can't recognise it.

A
Assertion and reason both are correct statements but reason does not explain assertion.
B
Assertion and reason both are correct and reason explains the assertion.
C
Both assertion and reason are wrong statements.
D
Assertion is correct statement reason is wrong statement.
E
Assertion is wrong statement reason is correct statement.
93
MCQ (Single Correct Answer)

Assertion (A) Chemical messenger gives message to the cell without entering the cell.

Reason (R) Chemical messenger is received at the binding site of receptor proteins.

A
Assertion and reason both are correct statements but reason does not explain assertion.
B
Assertion and reason both are correct and reason explains the assertion.
C
Both assertion and reason are wrong statements.
D
Assertion is correct statement reason is wrong statement.
E
Assertion is wrong statement reason is correct statement.
94
MCQ (Single Correct Answer)

Assertion (A) Receptor proteins show selectivity for one chemical messenger over the other.

Reason (R) Chemical messenger binds to the receptor site and inhibits its natural function.

A
Assertion and reason both are correct statements but reason does not explain assertion.
B
Assertion and reason both are correct and reason explains the assertion.
C
Both assertion and reason are wrong statements.
D
Assertion is correct statement reason is wrong statement.
E
Assertion is wrong statement reason is correct statement.
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