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SS1: BIOLOGY - 1ST TERM

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  1. Introduction to Biology | Week 1
    7 Topics
    |
    2 Quizzes
  2. Recognizing Living Things | Week 2
    3 Topics
    |
    1 Quiz
  3. Organisation of Life | Week 3
    3 Topics
    |
    2 Quizzes
  4. Classification of Living Organisms | Week 4
    6 Topics
    |
    2 Quizzes
  5. Kingdom Prokaryotae / Monera & Kingdom Protista | Week 5
    4 Topics
    |
    3 Quizzes
  6. Kingdom Fungi & Kingdom Plantae | Week 6
    10 Topics
    |
    2 Quizzes
  7. Kingdom Animalia I | Week 7
    7 Topics
    |
    1 Quiz
  8. Kingdom Animalia II | Week 8
    6 Topics
    |
    2 Quizzes
  9. The Cell | Week 9
    4 Topics
    |
    1 Quiz
  10. The Cell Structure and Functions | Week 10
    5 Topics
    |
    1 Quiz
  11. The Cell and its Environment | Week 11
    5 Topics
    |
    1 Quiz
  12. Nutrition in Plants | Week 12
    5 Topics
    |
    1 Quiz

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Topic Content:

  • Theory Questions & Answers – The Cell Structure and Functions

Theory Questions – The Cell Structure and Functions:

1. List 5 organelles found in a cell.

2. State at least one function for each organelle.

3. In a tabular form state five (5) differences between a plant cell and an animal cell.

4. Mention three (3) organelles that are found in both plant and animal cells.

(a) Mention three organelles that are found in both Plant and animal cells.

(b) Give two examples each of organisms that exist in the diverse cellular form.

View Answers

Theory Questions – The Cell Structure and Functions

1. List 5 organelles found in a cell.

Answer:

Five organelles found in the cells are: Cell wall, Cell membrane, Cytoplasm, Mitochondria Nucleus  

 

2. State at least one function for each organelle.

Answer:

Functions of:

  • Cell wall: Gives plant cells shape and mechanical support
  • Cell membrane: Selectively controls the movement of substances in and out of the cell
  • Cytoplasm: Cytoplasmic organelles are suspended in the cytoplasm and many reactions take place there, which keeps the cell alive.
  • Mitochondria: Responsible for producing energy from food substances during aerobic respiration
  • Nucleus: Controls and coordinates many activities of the cell.

 

3. In a tabular form state five (5) differences between a plant cell and an animal cell.

Answer:

  Plant Cell Animal Cell
i. Presence of rigid cell wall. Absence of cell wall.
ii. Presence of chloroplast and other plastids. Lack chloroplasts and other plastids.
iii. Presence of a large central vacuole. Vacuoles are absent but when present are small in size.
iv. Rigid cell wall gives it a definite shape. Has no definite shape.

 

4. Mention three (3) organelles that are found in both plant and animal cells.

Answer:

  • Cell membrane
  • Mitochondria
  • Nucleus

 

(a) Mention three organelles that are found in both Plant and animal cells.

Answer: Amoeba, Paramecium, Euglena, Chlamydomonas  

 

(b) Give two examples, each, of organisms that exist in diverse cellular forms.

Answer:

  • Colony of independent cells: Volvox, Pandorina
  • Filament of independent cells: Spirogyra, Zygnema, Vedogonium

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