NEET Biology Solved Question Paper 2012

Multiple Choice Questions

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Which of the following is a total root parasite?

  • Cuscuta

  • Rafflesia

  • Santalum

  • Monotrapa

B.

Rafflesia

Rafflesia is a total root parasite, which remains attached to the roots of the host plants and derives all of its nutrition from them. Cuscuta (dodder or amarbel) is a total stem parasite, while Santalum album (sandalwood) is a partial root parasite.

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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

    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

    DNA replication occurs in

    • G1-phase

    • S-phase

    • G2-phase

    • M-phase

    Answer
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    AIDS virus contains

    • RNA with protein

    • DNA with protein

    • DNA without protein

    • bNA only

    Answer