Chapter: 03. The Cell
Section A: Multiple Choice Questions (8 Marks)
Choose the best answer for each question.
Who discovered cells in 1665?
a) Robert Brown
b) Anton van Leeuwenhoek
c) Robert Hooke
d) Charles Darwin Which part of the cell is found only in plant cells and provides rigidity?
a) Cell membrane
b) Cytoplasm
c) Cell wall
d) Nucleus Organisms made of only one cell are called:
a) Multicellular
b) Unicellular
c) Complex
d) Tissue The “control centre” of the cell is the:
a) Mitochondrion
b) Vacuole
c) Cytoplasm
d) Nucleus Which plastids are responsible for the green color of leaves?
a) Chromoplasts
b) Leucoplasts
c) Chloroplasts
d) Tonoplasts Which of these is typically absent in an animal cell?
a) Nucleus
b) Cytoplasm
c) Cell wall
d) Cell membrane The longest cells in the human body are:
a) Red blood cells
b) Muscle cells
c) Nerve cells
d) Fat cells The fluid-filled space in plant cells that stores water and nutrients is called a:
a) Nucleolus
b) Cytoplasm
c) Vacuole
d) Plastid Section B: Fill in the Blanks (8 Marks)
Complete the following sentences with the correct word(s).
Cells are the basic unit of _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ in all living beings. The study of cells is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. New cells arise by the division of _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ cells. A group of similar cells performing a specific function is called a _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. White blood cells move using temporary projections called _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. The cell membrane is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ permeable, controlling what enters and leaves the cell. Chromatin material is composed of DNA and _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ are often called the “powerhouse of the cell.” Section C: True/False Questions (5 Marks)
State whether each statement is True or False.
The cells observed by Robert Hooke in cork were living cells. All plants and animals visible to the naked eye are multicellular. Red blood cells in humans have a nucleus. Leucoplasts give color to flowers and fruits. Cell division is needed to replace old and worn-out cells. Section D: Explanation of Terms (6 Marks)
Explain each term in one to two sentences.
Selectively Permeable Membrane Section E: Short Answer Questions (10 Marks)
Answer the following questions in 2-3 sentences.
What are the two main points of the Cell Theory? Why do cells have different shapes? Give an example. Why is the cell wall important for plant cells? What is the main function of the nucleus in a cell? List three reasons why new cells are needed in our body. Section F: Identifying and/or Differentiate Concepts (6 Marks)
Distinguish between the following pairs.
Chloroplasts and Chromoplasts Plant cell and Animal cell (provide two differences) Section G: Diagram-Based Questions (7 Marks)
An illustration shows a typical animal cell with various organelles labeled. Identify the labeled parts and answer the questions. a) Label the parts marked A, C, and F. (3 Marks)
b) Is a cell wall present in this cell? Why or why not? (2 Marks)
c) Name the part that helps in releasing energy for the cell. (1 Mark)
d) Which part controls all activities of the cell? (1 Mark)
Practice Paper
