NEET Practice Questions (MCQs) with Answers & Solutions

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The destruction of the biological nature and activity of proteins by heat or chemical agent is called:-

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Explanation

(b) After denaturation, soluble proteins become insoluble.The process which brings in the changes in physical and biological activity of proteins.

Kwashiorkor is caused by the deficiency of ?

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Explanation

(d) The deficiency of essential amino acids causes disease like kwashiorkor in which water balance of body is disturbed.

Which is fat soluble vitamin?

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Explanation

(a) Fat soluble vitamins are A,D,E and K.

Which vitamin contains N ?

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Explanation

(c) N is present in all vitamins B, (i.e., B1, B2, B3, B5, B6, B12).

A vitamin which plays a vital role in the coagulating property of blood is:-

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Explanation

(d) Vitamin K deficiency causes excessive bleeding in injury.

Which is not a poison for enzymes?

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Explanation

(b) Rest all are poisons for enzymes.

 

The non-proteinous substances which certain enzymes require for their activity are called:

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Explanation

(c) A non-protein that plays an essential part in some reactions catalysed by enzymes are called co-enzymes or activators, eg, non-proteinous vitamins.

Which one is the complimentary base of adenine in one stand to that in the other stand of DNA?

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Explanation

(d) Follow replication in nucleic acid.

C bonds with G and A bonds with T. It's called complementary base pairing because each base can only bond with a specific base partner.

Antibodies are ?

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Explanation

(b) Antibodies are the proteins produced in response to the presence of foreign substances in the blood or tissues.

Which of the following statements about enzymes is incorrect?

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Explanation

(a) Enzymes catalytic action is highly specific; one enzyme catalyses one reaction only.

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