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    CBSE

    Subject

    Biology
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    NEET Biology : Human Reproduction

    Multiple Choice Questions

    71.

    How many sperm cells are present in an average (3 mL) ejaculation?

    • 200 million

    • 300 million

    • 400 million

    • 500 million

    Answer
    • 72.

    Due to alcohol abuse, brain-related disease Korsakkoff’s syndrome occurs. Which nutrient is responsible for this syndrome?

    • Vitamin-B12

    • Fat

    • Protein

    • Vitamin-B1

    Answer
    • 73.

    In human, during fertilization, a sperm firstly comes in contact with which layer of the ovum

    • Zona pellucida

    • Vitelline membrane

    • Jelly coat

    • Zona radiata

    Answer
    • 74.

    The extra structure that provides nutrition to the embryo is

    • umbilicus

    • amnion

    • chorian

    • placenta

    Answer
    • 75.

    In case of pregnancy, the heartbeat of embryo starts at

    • 4th week

    • 7th week

    •  6th week

    •  5th week

    Answer
    • 76.

    The number of chromosomes in a primary spermatocyte is

    • Same as in spermatid

    • Same as in spermatogonium

    • Help of that in spermatogonium

    • Same as in secondary spermatocyte

    Answer
    • 77.

    The middle piece of the sperm contains

    • Proteins

    • Centriole

    • Nucleus

    • Mitochondria

    Answer
    • 78.

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

    • Chorion

    • Allantois

    • Yolk sac

    • Amnion

    Answer
    • 79.

    LH and FSH are collectively called

    • oxytocin

    • samatotrophins

    • luteotropic

    • gonadotropins

    Answer
    • 80.

    Prothallus of the fern produces

    • Spores

    • Gametes

    • Both (a) and (b)

    • Cones

    Answer
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