Subject

Biology

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

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 Multiple Choice QuestionsShort Answer Type

1.

Name the part of the flower which the tassels of the corn-cob represent.

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2.

Mention any two contrasting traits with respect to seeds in pea plant that were studied by Mendel.

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3.

Why is secondary immune response more intense than the primary immune response in human?

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4.

Why is it not possible for an alien DNA to become part of a chromosome anywhere along its length and replicate normally?


The replication does not initiate randomly at any place in DNA it only starts at the site of origin of replication (ORI), thus it is not possible for an alien DNA to become part of a chromosome  anywhere along its length and replicate normally .

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5.

State the role of C-peptide in human insulin.

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6.

Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells for recombinant DNA technology.

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7.

State Gause's Competitive Exclusion Principle.

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8.

Name the type of association that the genus Glomus exhibits with higher plants.

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9.

Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

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10.

In Snapdragon, A cross between true breeding red flower (RR) plants and true breeding white flower (rr) plants showed a Progeny of plants with all pink flowers.

(a)The appearance of pink flowers is not known as blending. Why?(b)What is the phenomenon known as?

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