BIOLOGY EXAMINATION 2026 – CELL BIOLOGY
KEY TERMS & DEFINITIONS
(Cell Structure, Transport & Microscopy)
Qualification: GCSE/IGCSE Biology (AQA / OCR Specification – Cell Biology
Topic)*
Topic Area: Cell Structure & Function
Date: __________________________
Time: __________________________
Duration: ______________________
Total Marks: 60
INSTRUCTIONS TO CANDIDATES
Define each term clearly and scientifically.
Use correct biological terminology.
Include examples or functions where appropriate.
Avoid vague descriptions—answers must be precise and concise.
, Sub-cellular structures
structures found in cells that include the nucleus, mitochondria, chloroplasts and ribosomes
Nucleus
the control centre of the cell
Cytoplasm
the substance found in living cells (outside the nucleus), where chemical reactions take place
Cell membrane
a layer that holds the cytoplasm in a cell and controls what enters and leaves the cell
Mitochondria
the structures in the cytoplasm where energy is produced from chemical reactions
Ribosomes
small structures found in the cytoplasm of living cells where protein synthesis takes place
Cell wall
KEY TERMS & DEFINITIONS
(Cell Structure, Transport & Microscopy)
Qualification: GCSE/IGCSE Biology (AQA / OCR Specification – Cell Biology
Topic)*
Topic Area: Cell Structure & Function
Date: __________________________
Time: __________________________
Duration: ______________________
Total Marks: 60
INSTRUCTIONS TO CANDIDATES
Define each term clearly and scientifically.
Use correct biological terminology.
Include examples or functions where appropriate.
Avoid vague descriptions—answers must be precise and concise.
, Sub-cellular structures
structures found in cells that include the nucleus, mitochondria, chloroplasts and ribosomes
Nucleus
the control centre of the cell
Cytoplasm
the substance found in living cells (outside the nucleus), where chemical reactions take place
Cell membrane
a layer that holds the cytoplasm in a cell and controls what enters and leaves the cell
Mitochondria
the structures in the cytoplasm where energy is produced from chemical reactions
Ribosomes
small structures found in the cytoplasm of living cells where protein synthesis takes place
Cell wall
