Online Test — Cell - The Unit of Life
15 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 15
The basic structural and functional unit of life is the:
Tissue
Cell
Organ
Molecule
Explanation: The cell is the basic unit of life.
Question 2 of 15
The cell was first observed (in cork) by:
Schwann
Robert Hooke
Virchow
Schleiden
Explanation: Robert Hooke first observed cells in cork (1665).
Question 3 of 15
'All cells arise from pre-existing cells' was stated by:
Hooke
Leeuwenhoek
Rudolf Virchow
Schleiden
Explanation: Virchow extended the cell theory with this statement.
Question 4 of 15
Prokaryotic cells lack:
A cell membrane
Cytoplasm
A true (membrane-bound) nucleus
DNA
Explanation: Prokaryotes have no true nucleus; DNA lies in a nucleoid.
Question 5 of 15
Which structure is present in a plant cell but NOT an animal cell?
Cell wall
Nucleus
Mitochondria
Ribosomes
Explanation: Plant cells have a cell wall (also plastids, large vacuole); animal cells do not.
Question 6 of 15
The plasma membrane is best described by the:
Cell theory
Fluid mosaic model
Lock and key model
Germ theory
Explanation: The fluid mosaic model describes the membrane structure.
Question 7 of 15
The plant cell wall is mainly made of:
Chitin
Cellulose
Protein
Lipid
Explanation: The plant cell wall is made of cellulose.
Question 8 of 15
Rough endoplasmic reticulum is the site of synthesis of:
Lipids
Proteins
Carbohydrates only
ATP
Explanation: Rough ER bears ribosomes and synthesises proteins.
Question 9 of 15
The organelle that modifies, packs and dispatches cell products is the:
Golgi apparatus
Lysosome
Vacuole
Centrosome
Explanation: The Golgi apparatus modifies, packs and dispatches materials.
Question 10 of 15
Lysosomes are called the 'suicide bags' because they contain:
Pigments
Digestive enzymes
Chlorophyll
DNA
Explanation: Lysosomes hold digestive enzymes that can destroy the cell.
Question 11 of 15
The 'powerhouse of the cell', producing ATP, is the:
Ribosome
Mitochondrion
Golgi body
Nucleus
Explanation: Mitochondria carry out aerobic respiration to make ATP.
Question 12 of 15
Photosynthesis occurs in the:
Chloroplast
Chromoplast
Leucoplast
Mitochondrion
Explanation: Chloroplasts contain chlorophyll and carry out photosynthesis.
Question 13 of 15
Ribosomes are the site of:
Respiration
Protein synthesis
Photosynthesis
Digestion
Explanation: Ribosomes synthesise proteins.
Question 14 of 15
The control centre of the cell is the:
Vacuole
Nucleus
Cell wall
Lysosome
Explanation: The nucleus controls all cell activities and inheritance.
Question 15 of 15
During cell division, chromatin condenses to form:
Ribosomes
Chromosomes
Lysosomes
Vacuoles
Explanation: Chromatin condenses into rod-like chromosomes during division.