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

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QQ/S3BI/CH1

Secondary 3 · Biology (G2 / G3)

Chapter 1 Practice Paper

Cell Structure and Organisation

Duration: 40 minutes

Total: 30 marks

Name:

Class:

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, with units where a quantity is calculated.
Note that 1 mm = 1000 µm.
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. Plant and animal cell structures, organelles seen with the electron microscope, plant–animal comparison, cell specialisation, levels of organisation and magnification calculations.

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
Which structure is the site of aerobic respiration in a cell?
1. Athe chloroplast
2. Bthe ribosome
3. Cthe mitochondrion
4. Dthe Golgi body
( )
2
Which structures are found in a typical plant cell but are absent from a typical animal cell?
1. Anucleus and cytoplasm
2. Bcell wall, chloroplasts and a large permanent vacuole
3. Ccell membrane and mitochondria
4. Dribosomes and a nucleus
( )
3
A cell appears 12 mm wide in a photograph. Its real width is 60 µm. The magnification is
1. A×5
2. B×0.2
3. C×200
4. D×2000
( )
4
A tissue is best described as
1. Aany structure made of cells
2. Ba group of different organs working together
3. Cone cell performing every life process
4. Da group of similar cells carrying out the same function
( )
5
Compared with other cells of the root, a root hair cell absorbs water faster because its hair
1. Astores food made during photosynthesis
2. Bgives it far more surface area touching the soil water
3. Clets the cell move freely through the soil
4. Dproduces chloroplasts for photosynthesis underground
( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

1
The diagram below (described) shows a cell with a cellulose cell wall, a large vacuole full of cell sap, and many green oval organelles in its cytoplasm.
1. (a)
  Name the two structures named in the description that are absent from a typical animal cell.
  [2]
2. (b)
  State one function of the cell membrane and one function of the vacuole.
  [2]
3. (c)
  The green oval organelles contain a green pigment. Name the organelle and the pigment, and state the process the pigment makes possible.
  [2]
2
A student studies an onion epidermal cell drawn 8 mm wide in her notes. The drawing was made at a magnification of ×400.
1. (a)
  State what is meant by the magnification of a drawing or photograph.
  [1]
2. (b)
  Calculate the real width of the cell in µm.
  width =µm[2]
3. (c)
  Explain why a temporary stain is applied before viewing the cell under the light microscope.
  [2]
4. (d)
  Name one structure of this cell that could only be seen clearly with an electron microscope, and give its function.
  [2]
3
Human red blood cells and root hair cells are both specialised cells.
1. (a)
  Describe one structural adaptation of a red blood cell (other than its lack of a nucleus) and explain how it helps oxygen transport.
  [2]
2. (b)
  Explain why the absence of a nucleus helps the red blood cell carry more oxygen.
  [2]
3. (c)
  Arrange these in order from smallest to largest, and name the level each represents: heart, cardiac muscle tissue, cardiac muscle cell, circulatory system.
  [3]

— End of paper —