ICSE Class 9 - Biology
Objective Question Bank: Chapter - Cell: The Unit of Life
A. Multiple Choice Questions (MCQs)
1. The structural and functional unit of life is:
a) Tissue b) Organ c) Cell d) Organ system
Ans: c) Cell
2. Which of the following is a prokaryotic cell?
a) Amoeba b) Bacteria c) Paramecium d) Euglena
Ans: b) Bacteria
3. The jelly-like substance present inside the cell is called:
a) Cytoplasm b) Protoplasm c) Nucleus d) Cell membrane
Ans: a) Cytoplasm
4. Which cell organelle is known as the 'powerhouse of the cell'?
a) Nucleus b) Mitochondria c) Ribosome d) Endoplasmic reticulum
Ans: b) Mitochondria
5. The nucleus is separated from the cytoplasm by:
a) Plasma membrane b) Cell wall c) Nuclear membrane d) Chromatin
Ans: c) Nuclear membrane
6. The organelle responsible for photosynthesis is:
a) Mitochondria b) Chloroplast c) Golgi body d) Ribosome
Ans: b) Chloroplast
7. Which of these is found only in plant cells?
a) Mitochondria b) Ribosomes c) Cell wall d) Cytoplasm
Ans: c) Cell wall
8. Which structure controls all the activities of the cell?
a) Nucleus b) Cytoplasm c) Cell membrane d) Mitochondria
Ans: a) Nucleus
9. A group of cells performing the same function is called a:
a) Tissue b) Organ c) Organism d) System
Ans: a) Tissue
10. Ribosomes are responsible for:
a) Respiration b) Protein synthesis c) Digestion d) Transport
Ans: b) Protein synthesis
11. Who discovered the cell?
a) Leeuwenhoek b) Robert Hooke c) Schleiden d) Schwann
Ans: b) Robert Hooke
12. Cell theory was proposed by:
a) Hooke & Leeuwenhoek b) Schleiden & Schwann c) Watson & Crick d) Jenner & Pasteur
Ans: b) Schleiden & Schwann
B. Fill in the Blanks
1. __________ is the outermost boundary of an animal cell. Ans: Cell membrane
2. __________ was the first to observe living cells. Ans: Anton van Leeuwenhoek
3. The __________ helps in the formation of spindle fibres. Ans: Centriole
4. __________ are called suicidal bags of the cell. Ans: Lysosomes
5. __________ do not obey the cell theory. Ans: Viruses
C. True or False
1. Prokaryotic cells have a well-defined nucleus. False
2. All cells have a plasma membrane. True
3. Mitochondria are present in both plant and animal cells. True
4. Ribosomes are only found in the nucleus. False
5. Lysosomes are only found in plant cells. False
D. Match the Columns
1. Mitochondria - c) Energy production
2. Nucleus - a) Controls cell activity
3. Ribosome - d) Protein synthesis
4. Chloroplast - b) Photosynthesis
5. Cell membrane - e) Regulates entry/exit
E. Odd One Out (with Reason)
1. Mitochondria, Nucleus, Chloroplast, Cell wall
Odd One: Cell wall (non-living)
2. Ribosome, Golgi apparatus, Endoplasmic reticulum, Vacuole
Odd One: Ribosome (non-membranous)
F. Assertion and Reason
1. A: Mitochondria are called the powerhouse of the cell.
R: Mitochondria help in photosynthesis.
Ans: c) A is true, R is false
2. A: Animal cells do not have a cell wall.
R: Animal cells have chloroplasts.
Ans: c) A is true, R is false
