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    2.

    Universal donors and universal receipients are

    A

    A, B and O blood groups, respectively

    B

    O and AB blood groups, respectively

    C

    O and A blood groups, respectively

    D

    AB and O blood groups, respectively

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    4.

    Which of the following option describes all the components of human blood?

    A

    Plasma, red blood cells, white blood cells, and platelets

    B

    Red blood cells, white blood cells, and serum

    C

    Plasma, serum, and hemoglobin

    D

    Red blood cells, white blood cells, and lymph

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    9.

    Which statement regarding the 'I' gene controlling ABO blood groups is INCORRECT?

    A

    When IA and IB are present together they express both A and B antigens

    B

    When IA and IB are present together they express same type of sugar

    C

    Allele 'i' does not produce any sugar

    D

    The gene 'I' has three alleles

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