PYQ Vault

Day 19: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

  1. Question 1

    Electricity. Asked 2 times: 2023*, 2026 (* = numbers or wording changed that year)

    30
    The correct way to connect an ammeter and a voltmeter in an electric circuit is :

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  2. Question 2

    Heredity. Asked 2 times: 2025*, 2026 (* = numbers or wording changed that year)

    6
    Two pea plants, one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds were crossed with each other which produced F1\mathrm{F_1} progeny that have only round yellow (RrYy) seeds. When F1\mathrm{F_1} plants are self-pollinated, the F2\mathrm{F_2} progeny will have which new combination of characters, as compared to the parents : (i) Round, yellow (ii) Round, green (iii) Wrinkled, yellow (iv) Wrinkled, green Correct options are :

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  3. Question 3

    Heredity. Asked 2 times: 2024*, 2026 (* = numbers or wording changed that year)

    14
    (a) Giving two examples, justify the statement that the sex of the offspring in all animals is not always genetically determined. (b) Differentiate between the sex chromosomes of male and female human beings.

  4. Question 4

    Heredity. Asked 2 times: 2023*, 2026 (* = numbers or wording changed that year)

    5
    When a human egg is fertilized by a sperm having ‘Y’ chromosome, the zygote has the following combination of chromosomes :

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  5. Question 5

    Heredity. Asked 2 times: 2024*, 2026 (* = numbers or wording changed that year)

    1
    Choose the correct statements with reference to chromosomes : (i) carry hereditary information from parents to next generation. (ii) are thread-like structures located inside the nucleus of an animal cell. (iii) always exist in pairs in human gametes. (iv) are involved in the process of cell division.

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