Quiz on Cell Biology

Cell Biology is the branch of biology that studies the structure, function, and behavior of cells — the basic units of life. Every living organism, from the smallest bacterium to the largest animal, is made up of cells. Cells can exist as independent units of life, as in unicellular organisms like amoeba, or can form complex multicellular organisms like humans. Each cell has specific parts called organelles — such as the nucleus (which controls activities), mitochondria (which produce energy), ribosomes (which make proteins), and the Golgi apparatus (which packages materials). The cell membrane controls what enters and leaves the cell, while in plants, an additional cell wall provides strength and protection. Understanding cell biology helps us grasp how life functions at its most fundamental level.

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Published by : on 25-Oct-2025 02:49 am

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MCQ Questions on Quiz on Cell Biology

Q. What is the basic structural and functional unit of life?

A. Tissue

B. Organ

C. Cell

D. Organ system

Correct: Option (C)

Explanation: The cell is the smallest unit that can carry out all life processes. All living organisms are made up of one or more cells.

Q. Who discovered the cell in 1665?

A. Robert Hooke

B. Anton van Leeuwenhoek

C. Rudolf Virchow

D. Theodor Schwann

Correct: Option (A)

Explanation: Robert Hooke discovered cells in 1665 when he observed cork slices under a microscope.

Q. Which organelle is known as the powerhouse of the cell?

A. Golgi apparatus

B. Nucleus

C. Mitochondria

D. Ribosome

Correct: Option (C)

Explanation: Mitochondria generate energy in the form of ATP, earning them the nickname 'powerhouse of the cell'.

Q. Which structure controls the activities of the cell?

A. Cell wall

B. Nucleus

C. Cytoplasm

D. Plasma membrane

Correct: Option (B)

Explanation: The nucleus acts as the control center of the cell as it contains DNA and regulates all cellular activities.

Q. Plant cells have a rigid outer covering called the:

A. Cell membrane

B. Cell wall

C. Cytoplasm

D. Nucleus

Correct: Option (B)

Explanation: The cell wall, made of cellulose, provides structural support and rigidity to plant cells.

Q. Which of the following is a single-celled organism?

A. Amoeba

B. Frog

C. Human

D. Tree

Correct: Option (A)

Explanation: Amoeba is a unicellular organism that performs all life processes within one cell.

Q. Ribosomes are responsible for:

A. Energy production

B. Protein synthesis

C. Digestion

D. Photosynthesis

Correct: Option (B)

Explanation: Ribosomes are tiny organelles that assemble amino acids to form proteins.

Q. Which organelle helps in packaging and transport of materials within the cell?

A. Golgi apparatus

B. Lysosome

C. Mitochondria

D. Endoplasmic reticulum

Correct: Option (A)

Explanation: The Golgi apparatus modifies, sorts, and packages proteins and lipids for storage or transport out of the cell.

Q. Which part of the cell contains the hereditary material DNA?

A. Mitochondria

B. Nucleus

C. Ribosome

D. Golgi body

Correct: Option (B)

Explanation: DNA is stored in the nucleus of eukaryotic cells, carrying genetic information.

Q. What is the jelly-like substance found inside the cell membrane called?

A. Protoplasm

B. Cytoplasm

C. Nucleoplasm

D. Endoplasm

Correct: Option (B)

Explanation: The cytoplasm is a jelly-like fluid that fills the cell and holds organelles in place.

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