9th class Biology, Chapter 3: The Cell MCQs

1. The process of cellular respiration occurs in:

1. (A) Nucleus
2. (B) Mitochondria ✓
3. (C) Ribosomes
4. (D) Golgi apparatus

2. The smooth endoplasmic reticulum (SER) is primarily involved in the synthesis of:

1. (A) Proteins
2. (B) Lipids ✓
3. (C) Carbohydrates
4. (D) Nucleic acids

3. Which specialized region of the nucleus is responsible for ribosome assembly?

1. (A) Nucleoplasm
2. (B) Nucleolus ✓
3. (C) Chromatin
4. (D) Chromatid

4. What is the primary function of ribosomes?

1. (A) Energy production
2. (B) Protein synthesis ✓
3. (C) Lipid synthesis
4. (D) DNA synthesis

5. What is the main function of the nuclear pores?

1. (A) Regulation of cell division
2. (B) Protein synthesis
3. (C) Control of pH of the cell
4. (D) Control of transport of molecules ✓

6. Which cell organelle is responsible for breaking down waste materials?

1. (A) Golgi apparatus
2. (B) Nucleus
3. (C) Mitochondria
4. (D) Lysosome ✓

7. Which of the following cellular structures is found in animal cells and helps in cell division?

1. (A) Cell membrane
2. (B) Centriole ✓
3. (C) Plasmodesma
4. (D) Vacuole

8. Which sub-cellular organelle plays a crucial role in energy production within the cell?

1. (A) Endoplasmic reticulum
2. (B) Golgi apparatus
3. (C) Mitochondria ✓
4. (D) Lysosomes

9. In a multicellular plant, which cell type is responsible for the production of glucose?

1. (A) Xylem
2. (B) Phloem
3. (C) Epidermal
4. (D) Mesophyll ✓

10. Which organelle can double its number by itself?

1. (A) Ribosomes
2. (B) Lysosomes
3. (C) Mitochondria ✓
4. (D) Golgi apparatus

11. The basic unit of life is the:

1. (A) cell ✓
2. (B) tissue
3. (C) organ
4. (D) organ system

12. In 1665 Robert Hooke examined a thin slice of ____ under a simple microscope and discovered cells.

1. (A) cork ✓
2. (B) onion peel
3. (C) leaf
4. (D) blood

13. The nucleus was observed in plant cells in 1831 by:

1. (A) Robert Brown ✓
2. (B) Robert Hooke
3. (C) Camillo Golgi
4. (D) Christian de Duve

14. Prokaryotic cells are simple and do not have:

1. (A) membrane-bound organelles ✓
2. (B) a cell membrane
3. (C) cytoplasm
4. (D) DNA

15. Which of the following is NOT a layer of the plant cell wall?

1. (A) Middle lamella
2. (B) Primary wall
3. (C) Secondary wall
4. (D) Plasma wall ✓

16. The layer that holds together the primary walls of adjacent plant cells is the:

1. (A) middle lamella ✓
2. (B) secondary wall
3. (C) cell membrane
4. (D) cytoplasm

17. The secondary wall of xylem cells is mainly made of cellulose, lignin and:

1. (A) other chemicals ✓
2. (B) peptidoglycan
3. (C) chitin
4. (D) cholesterol

18. The cell wall of prokaryotes is made of:

1. (A) peptidoglycan ✓
2. (B) cellulose
3. (C) chitin
4. (D) lignin

19. Channels in cell walls that allow the exchange of molecules between adjacent cells are called:

1. (A) plasmodesmata ✓
2. (B) nuclear pores
3. (C) cristae
4. (D) cisternae

20. The structure of the cell membrane is described by the:

1. (A) fluid-mosaic model ✓
2. (B) cell theory
3. (C) double helix model
4. (D) lock-and-key model