NEET Biology Solved Question Paper 2012

Multiple Choice Questions

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DNA replication occurs in

  • G1-phase

  • S-phase

  • G2-phase

  • M-phase

B.

S-phase

The s-phase of the cell cycle is also called 'synthesis phase, in which the cell synthesizes the replica of its genome, ie, DNA replication occurs during this stage, which ultimately results to the duplication of chromosomal material.

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    Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?

    • Chorion

    • Allantois

    • Yolk sac

    • Amnion

    Answer

    A transgenic food crop, which may help in solving the problem of nightblindness in developing countries is

    • Flavr savr tomatoes

    • Starlink maize

    • Bt soyabean

    • Golden rice

    Answer

    Polyploidy can be induced by the application of

    • Auxin

    • Kinetin

    • Colchicine

    • Ethylene

    Answer

    Which of the following bio-engineered bacteria is utilized for cleaning of marine oil slicks?

    • Escherichia coli

    • Pseudomonas syringae

    • Pseudomonas putida

    • Rhizoctonia solani

    Answer
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    Cells obtained from cancerous tumours are known as

    • Hybridomas

    • Myelomas

    • Lymphocytes

    • Monoclonal cells

    Answer

    Which of the following is a total root parasite?

    • Cuscuta

    • Rafflesia

    • Santalum

    • Monotrapa

    Answer

    When pollen tube enters through micropyle, the process is called

    • Porogamy

    • Chalazogamy

    • Mesogarny

    • Apogamy

    Answer

    Outer wall of pollen grain is made up of

    • Cellulose

    • Sporopollenin

    • Pectocellulose

    • Lignin

    Answer
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    AIDS virus contains

    • RNA with protein

    • DNA with protein

    • DNA without protein

    • bNA only

    Answer