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Zoology MCQs for NEET — Practice Questions with Answers

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Nitrogenous bases which contain 2 heterocyclic rings are

Adenine

Thymine

Guanine

Both 1 and 3

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Explanation

Refer NCERT, Heading 9.1, page-144, para 3, Figure 9.1

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Uridine is

Nucleotide

Nucleoside

Nitrogenous base

Amino acid

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Explanation

Refer NCERT, Heading 9.1, page-144, para 3, Figure 9.1

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Cytidylic acid is

Nucleotide

Nucleoside

Nitrogenous base

Amino acid

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Explanation

Refer NCERT, Heading 9.1, page-144, para 3, Figure 9.1

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Which one is correct

Adenine = Pyrimidine, Uracil= Purine

Adenine= Purine, Uracil= Purine

Adenine= Adenylic acid, Uracil=Uridylic acid

Adenine= Purine, Uracil= Pyrimidine

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Explanation

Refer NCERT, Heading 9.1, page-144, para 3, Figure 9.1

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Which of the following is true?

All the elements present in a sample of earth’s crust are also present in a sample of living tissue

Carbon and Hydrogen are present in more amount in any living organism than earth’s crust.

Carbon and Hydrogen are present in more in living organisms than in non living matter.

All of the above

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Explanation

Refer NCERT, Introduction page-142, para 1, Table 9.1

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Select the correct arrangement of elements present in human body

C>O>H>N

C>O>N>H

O>C>H>N

O>C>N>H

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Explanation

Refer NCERT, Introduction page-142,143 para 1, Table 9.1

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When chemical analysis of living tissue was done using trichloroacetic acid, then then filtrate formed was

acid insoluble fraction

acid soluble fraction

retentate

Both A and C

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Explanation

Refer NCERT, Heading 9.1, page-142, para 1

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Which of the following is incorrect?

Sulphates and phosphates are seen in acid soluble pool

Sulphates and phosphates are seen in acid insoluble pool

All carbon compounds that we get from living tissue can be called as biomolecules

Elemental analysis gives elemental composition of the living tissues.

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Explanation

Refer NCERT, Heading 9.1, page-142, para 1

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Which of the following inorganic compound is present in living body?

Carbohydrates

Proteins

Water

Lipids

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Explanation

Refer NCERT, Heading 9.1, page-142, para 1

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Which of the following is true?

All enzymes are proteins

All proteins are enzymes

Nucleic acids never behave as enzymes

Almost all enzymes are proteins

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Explanation

Refer NCERT, Heading 9.12, page-154, Para1

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