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Chapter 6 Practice Paper: Reproduction — question paper

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QQ/S4BI/CH6

Secondary 4 · Biology (G2 / G3)

Chapter 6 Practice Paper

Reproduction

Duration: 40 minutes
Total: 30 marks
Name:
Class:
Register No.:
Date:

READ THESE INSTRUCTIONS FIRST

  • Write your name, class and register number in the spaces at the top of this page.
  • Answer all questions.
  • Give numerical answers correct to 3 significant figures unless stated otherwise.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total number of marks for this paper is 30.

Original practice material written for the MOE Biology syllabus. It is not an official MOE or school examination paper. Asexual and sexual reproduction; mitosis and meiosis; haploid, diploid and homologous pairs; flower structure, pollination and fertilisation; human reproductive systems; the menstrual cycle; fertilisation, implantation, amniotic sac, placenta and umbilical cord; HIV transmission and reduction.

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose the one correct answer for each question.

  1. 1

    Which cell division produces genetically identical cells with the chromosome number unchanged?

    1. Ameiosis
    2. Bmitosis
    3. Cfertilisation
    4. Dpollination
    ( )
  2. 2

    A human body cell has 46 chromosomes. A sperm cell contains

    1. A23 chromosomes, one of each homologous pair
    2. B46 chromosomes, the full set
    3. C92 chromosomes
    4. Dno chromosomes
    ( )
  3. 3

    Which feature belongs to a wind-pollinated rather than an insect-pollinated flower?

    1. Alarge bright petals
    2. Bsticky spiky pollen
    3. Cfeathery stigma hanging outside the flower
    4. Dsweet scent and nectar
    ( )
  4. 4

    In humans, fertilisation normally takes place in the

    1. Aovary
    2. Buterus
    3. Coviduct
    4. Dvagina
    ( )
  5. 5

    Which set of substances crosses the placenta from mother to foetus?

    1. Aoxygen and dissolved nutrients
    2. Bcarbon dioxide and urea
    3. Cred blood cells and antibodies only
    4. Dnothing crosses; the foetus is independent
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 1

    The described diagram shows an insect-pollinated flower in section: colourful broad petals surround a central stalk topped by a sticky surface, beneath which runs a tube down to a swollen base; around the stalk stand stalked structures with dusty yellow tips.

    1. (a)

      Name the parts described: the sticky top surface, the tube below it, the swollen base, and the dusty yellow tips — and state what the anther produces.

      [4]
    2. (b)

      Define cross-pollination and state one advantage it has over self-pollination.

      [2]
  2. 2

    Human body cells each contain 46 chromosomes.

    1. (a)

      State the chromosome number of a human egg cell and name the type of division that produces it.

      [2]
    2. (b)

      Explain why the type of division named in (a) is described as a reduction division.

      [2]
    3. (c)

      State the chromosome number of the zygote formed at fertilisation, and explain why this number is restored rather than doubled every generation.

      [3]
  3. 3

    A woman’s menstrual cycles last 26 days. In a cycle where day 1 is the first day of menstruation, and assuming a steady 14-day post-ovulation phase:

    1. (a)

      Calculate the day on which ovulation is expected.

      day[2]
    2. (b)

      Name the two hormones that act on the uterus lining during the cycle and state each one’s role.

      [3]
    3. (c)

      Identify the fertile phase of this cycle and explain briefly why the other days are comparatively infertile.

      [2]

— End of paper —