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Chapter 2 Practice Paper: Nutrition and Transport in Flowering Plants — question paper

QuizQuipPractice Series
QQ/S4CBI/CH2

Secondary 4 · Combined Science (Biology) (G2 / G3)

Chapter 2 Practice Paper

Nutrition and Transport in Flowering Plants

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 2 (leaf structure; xylem and phloem; root hair uptake; photosynthesis and rate factors; transpiration and wilting; translocation).

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 leaf layer contains the most chloroplasts?

    1. Aupper epidermis
    2. Bpalisade mesophyll
    3. Cspongy mesophyll
    4. Dlower epidermis
    ( )
  2. 2

    Xylem vessels carry

    1. Asucrose in both directions
    2. Bwater and dissolved mineral salts upwards
    3. Coxygen downwards
    4. Dstarch to the roots
    ( )
  3. 3

    Carbon dioxide enters a leaf through the

    1. Axylem
    2. Bcuticle
    3. Cstomata
    4. Droot hairs
    ( )
  4. 4

    Which condition SLOWS transpiration?

    1. Awindy conditions
    2. Bdry moving air
    3. Chigh humidity
    4. Dbright light
    ( )
  5. 5

    In a flowering plant, translocation is the transport of

    1. Afood (mainly sucrose) in the phloem
    2. Bwater vapour out of the stomata
    3. Cwater up the xylem
    4. Dmineral salts into root hairs
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 1

    The word equation for photosynthesis is central to this topic.

    1. (a)

      Give the word equation for photosynthesis and name the two conditions it needs.

      [3]
    2. (b)

      State the route by which the carbon dioxide reaches the palisade mesophyll cells.

      [2]
    3. (c)

      Explain why most life on Earth depends on photosynthesis.

      [2]
  2. 2

    Pondweed was placed under a lamp at different distances and oxygen bubbles were counted.

    Results

    Distance / cmBubbles per minute
    1040
    2010
    304
    1. (a)

      Describe the trend in the results.

      [2]
    2. (b)

      From 10 cm to 20 cm the distance doubles. Use the data to describe the change in rate.

      [2]
    3. (c)

      Name the factor limiting the rate at 30 cm and one other factor that could limit photosynthesis in bright light.

      [3]
  3. 3

    A leafy shoot in a potometer-style set-up loses water fastest under a fan and slowest in a humid chamber.

    1. (a)

      Define transpiration and name the structures through which most water vapour escapes.

      [2]
    2. (b)

      Explain why the fan increases the rate and the humid chamber decreases it.

      [3]
    3. (c)

      Name the process that links this water loss to the upward flow of water in the xylem.

      [1]

— End of paper —