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Chapter 15 Practice Paper: Reproduction, DNA and protein synthesis — question paper

QuizQuipPractice Series
QQ/GCSE-BIO/CH15

GCSE (9–1) · GCSE Biology (Foundation and Higher)

Chapter 15 Practice Paper

Reproduction, DNA and protein synthesis

Duration: 40 minutes
Total: 30 marks
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READ THESE INSTRUCTIONS FIRST

  • Answer all questions.
  • Section A contains ten multiple-choice questions. Choose one answer, A, B, C or D, for each.
  • Section B contains structured questions. Write your answers in the spaces provided.
  • You may use a calculator.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total mark for this paper is 30.

Original practice material written for the MOE GCSE Biology syllabus. It is not an official MOE or school examination paper. Chapter 15: sexual and asexual reproduction with advantages and disadvantages, meiosis and gametes, DNA structure and complementary base pairing, genes and the genome, protein synthesis (Higher), and mutations.

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

Section A: Multiple-choice questions[10 marks]

Choose one answer for each question. Each question is worth 1 mark.

  1. 1

    Asexual reproduction produces offspring that are

    1. Agenetically identical
    2. Bgenetically varied
    3. Calways stronger
    4. Dalways infertile
    ( )
  2. 2

    Meiosis makes

    1. Atwo gametes
    2. Bfour gametes
    3. Ctwo body cells
    4. Dfour body cells
    ( )
  3. 3

    A human sperm cell contains

    1. A46 chromosomes
    2. B23 chromosomes
    3. C92 chromosomes
    4. Dno chromosomes
    ( )
  4. 4

    In DNA, guanine pairs with

    1. Aadenine
    2. Bthymine
    3. Ccytosine
    4. Dribose
    ( )
  5. 5

    A nucleotide contains a sugar, a phosphate group and

    1. Aan amino acid
    2. Ba fatty acid
    3. Cone of four bases
    4. Da glucose unit
    ( )
  6. 6

    A gene codes for

    1. Aa sequence of amino acids
    2. Ba starch chain
    3. Ca fat droplet
    4. Da whole organ
    ( )
  7. 7

    (Higher) Protein synthesis happens on

    1. Athe nuclear membrane
    2. Bthe cell wall
    3. Cchromosomes directly
    4. Dribosomes in the cytoplasm
    ( )
  8. 8

    (Higher) The template molecule is needed because

    1. ADNA cannot leave the nucleus
    2. Bribosomes cannot read bases
    3. Camino acids are in the nucleus
    4. Dthe cell runs out of energy
    ( )
  9. 9

    The usual effect of a mutation on the phenotype is that it

    1. Akills the organism
    2. Bis caused by need
    3. Chappens only at puberty
    4. Dhas no effect
    ( )
  10. 10

    A DNA sample has 20% guanine. Cytosine makes up

    1. A30%
    2. B40%
    3. C80%
    4. D20%
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 11

    This question is about reproduction.

    1. (a)

      State two differences between sexual and asexual reproduction.

      [2]
    2. (b)

      Explain one advantage of variation in offspring.

      [2]
    3. (c)

      Name an organism that uses both sexual and asexual reproduction.

      [1]
  2. 12

    This question is about meiosis.

    1. (a)

      Describe what meiosis produces from one cell.

      [3]
    2. (b)

      A human body cell has 46 chromosomes. State how many chromosomes are in one gamete and explain how the full number is restored.

      [2]
    3. (c)

      State how meiosis contributes to variation.

      [1]
  3. 13

    This question is about DNA.

    1. (a)

      Describe the structure of a DNA molecule.

      [2]
    2. (b)

      A DNA sample contains 16% guanine. Calculate the percentage of thymine.

      [2]
  4. 14

    (Higher) This question is about mutations and proteins.

    1. (a)

      Explain how a mutation could change a protein’s activity.

      [3]
    2. (b)

      Explain why most mutations have no effect.

      [2]

— End of paper —