Topic 2 Practice Paper: Organisation of the organism — question paper

Section A: Multiple-choice questions[10 marks]

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

1. 1

   Which structures are found in BOTH plant cells and animal cells?

   1. ANucleus and mitochondria
   2. BCell wall and chloroplasts
   3. CChloroplasts and vacuole
   4. DCellulose wall and nucleus
   ( )
2. 2

   A cell has a cell wall but no nucleus. It also contains plasmids. What is it?

   1. AA plant cell
   2. BAn animal cell
   3. CA bacterial cell
   4. DA virus
   ( )
3. 3

   Which cell is specialised for conduction of electrical impulses?

   1. ANeurone
   2. BPalisade mesophyll cell
   3. CCiliated cell
   4. DEgg cell
   ( )
4. 4

   In which part of a plant would you expect to find cells with NO chloroplasts?

   1. ALeaf mesophyll
   2. BShoot tip
   3. CGreen stem
   4. DRoot
   ( )
5. 5

   Which level of organisation is a leaf?

   1. ACell
   2. BTissue
   3. COrgan
   4. DOrgan system
   ( )
6. 6

   A cell measures 0.1 mm across and appears 25 mm across in a drawing. What is the magnification?

   1. A×250
   2. B×2.5
   3. C×2500
   4. D×25
   ( )
7. 7

   An organelle in a micrograph at ×4000 measures 60 mm long. What is its real length?

   1. A15 mm
   2. B0.015 mm
   3. C0.015 µm
   4. D240 000 mm
   ( )
8. 8

   The vacuole of a plant cell contains

   1. Aair
   2. Bchlorophyll
   3. Chaemoglobin
   4. Dcell sap
   ( )
9. 9

   What is the function of plasmids in bacteria?

   1. AThey carry out respiration
   2. BThey are small extra rings of DNA
   3. CThey control entry and exit of substances
   4. DThey absorb light
   ( )
10. 10

    Which structure surrounds every cell and is partially permeable?

    1. ACell wall
    2. BCell membrane
    3. CCilia
    4. DVacuole
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

1. 11

   Diagrams of a plant cell and an animal cell are provided in a lesson. The plant cell is box-shaped with a wall, chloroplasts and a large vacuole; the animal cell is rounded with none of these.

   1. (a)

      Name the three structures visible in the plant cell but absent from the animal cell.

      [3]
   2. (b)

      State the function of each of the following: nucleus; mitochondrion.

      [2]
   3. (c)

      New cells appear as the plant grows. State where new cells come from.

      [1]
2. 12

   A student studies four specialised cells: a ciliated cell, a root hair cell, a palisade mesophyll cell and a red blood cell.

   Cell	Specific function
   Ciliated cell
   Root hair cell
   Palisade mesophyll cell
   Red blood cell

   1. (a)

      Complete the table by naming the specific function of each cell.

      [4]
   2. (b)

      Explain one way the structure of a red blood cell suits its function.

      [2]
   3. (c)

      A group of similar palisade cells working together is called a mesophyll tissue. State the term for the structure several such tissues form when they work together in a leaf.

      [1]
3. 13

   A plant cell on a micrograph appears 36 mm wide. The micrograph is magnified ×600.

   1. (a)

      Calculate the actual width of the plant cell, in mm.

      actual width =mm[2]
   2. (b)

      Write your answer to (a) in micrometres (µm).

      [1]
   3. (c)

      The nucleus in the same cell appears 12 mm wide and its actual width is 0.004 mm. Calculate the magnification of the micrograph.

      magnification =[2]
   4. (d)

      Another student measures the same nucleus as 12 mm and divides 12 by 4, getting ×3. Explain the error.

      [2]