Cell Structure and Function Quiz for Class 8 Science

Basic Unit of Life

• The cell is the fundamental unit of structure and function in all living organisms.
• Cells serve as the building blocks of life, carrying out essential biological processes.

Energy Production

• Mitochondria are known as the powerhouse of the cell, responsible for generating adenosine triphosphate (ATP), the main energy currency.
• Mitochondria convert nutrients into energy through cellular respiration.

Nucleus Function

• The nucleus acts as the control center of the cell, storing genetic material (DNA) and coordinating cellular activities like growth and reproduction.
• It regulates gene expression and mediates the replication of DNA during the cell cycle.

Cell Membrane Function

• The cell membrane serves as a protective barrier, controlling the movement of substances in and out of the cell.
• It is composed of a phospholipid bilayer and contains proteins that facilitate communication and transport.

Cytoplasm Function

• Cytoplasm is the gel-like substance within the cell that houses organelles, enzymes, and various molecules necessary for metabolic processes.
• It provides structural support and facilitates movement within the cell.

Protein Synthesis

• Ribosomes are the organelles responsible for synthesizing proteins by translating messenger RNA (mRNA) sequences into amino acid chains.
• Ribosomes can be found free in the cytoplasm or attached to the endoplasmic reticulum (ER), forming rough ER.

Test your knowledge of cell structure and function with this quiz for Class 8 Science. Explore the basic unit of structure and function in living organisms, the role of the nucleus, and the organelle responsible for energy production in a cell.