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Chapter 1 Practice Paper: Cell Structure and Organisation — question paper

QuizQuipPractice Series
QQ/S3CBI/CH1

Secondary 3 · Combined Science (Biology) (G2 / G3)

Chapter 1 Practice Paper

Cell Structure and Organisation

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

  • Answer all questions.
  • Section A: choose the one correct answer for each multiple-choice question.
  • Section B: answer in the spaces provided; show all necessary working.
  • Give numerical answers to 3 significant figures where appropriate, with units.
  • Biological drawings are not required; describe or label structures in words where asked.
  • The use of a calculator is permitted.

Original practice material written for the MOE Combined Science (Biology) syllabus. It is not an official MOE or school examination paper. Chapter 1 (cell structures and functions, mitochondria and ribosomes, animal vs plant cells, specialised cells).

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 structure controls the entry and exit of substances in a cell?

    1. Acell wall
    2. Bcell membrane
    3. Cnucleus
    4. Dlarge vacuole
    ( )
  2. 2

    A structure is described as an oval body with folded inner walls. It is a

    1. Aribosome
    2. Bchloroplast
    3. Cmitochondrion
    4. Dnucleus
    ( )
  3. 3

    Which structure is present in a leaf cell but absent from a root hair cell?

    1. Acell wall
    2. Bnucleus
    3. Cchloroplast
    4. Dcell membrane
    ( )
  4. 4

    Which adaptation of a red blood cell increases the oxygen it can carry?

    1. Aa thick cellulose wall
    2. Babsence of a nucleus
    3. Ca large permanent vacuole
    4. Dmany chloroplasts
    ( )
  5. 5

    Which statement compares animal and plant cells correctly?

    1. AAnimal cells have a cell wall made of cellulose.
    2. BPlant cells have small temporary vacuoles only.
    3. CAnimal cells contain chloroplasts in green tissues.
    4. DBoth cell types contain mitochondria and ribosomes.
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 1

    A student describes a cell seen under a light microscope: "A box-shaped cell with a stiff outer boundary, a thin inner boundary, grainy jelly containing a dark round body, several green discs, and one clear space taking up most of the interior."

    1. (a)

      Identify the type of cell described, giving one reason.

      [2]
    2. (b)

      Name the structure described as (i) the stiff outer boundary, (ii) the dark round body.

      [2]
    3. (c)

      State the function of the green discs and of the clear space.

      [2]
    4. (d)

      The grainy jelly contains many small structures that cannot be seen in this view. Name the microscope needed to see ribosomes, and state their function.

      [2]
  2. 2

    Two specialised cells are described. Cell X is a long fibre packed with mitochondria. Cell Y has a long narrow extension and no chloroplasts.

    1. (a)

      Identify Cell X and Cell Y.

      [2]
    2. (b)

      Explain why Cell X contains many mitochondria.

      [2]
    3. (c)

      Explain how Cell Y's shape suits its function.

      [3]
  3. 3

    A freshly watered lettuce is crisp, but a lettuce left on the counter overnight goes limp.

    1. (a)

      Name the plant cell structure that changes state between crisp and limp.

      [1]
    2. (b)

      Explain, using the vacuole and the cell wall, why a well-watered lettuce cell is firm.

      [2]
    3. (c)

      A student claims the wilted cells have "lost their cell walls". Comment on this claim.

      [2]

— End of paper —