Cell Structure and Function is one of 9 topics in the Grade 10 Life Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. According to cell theory, the cell is described as:
The basic structural and functional unit of life
A structure found only in animals
A type of organic biomolecule
A non-living chemical structure
Answer: The basic structural and functional unit of life — Cell theory states that the cell is the basic structural and functional unit of all living organisms.
Easy
2. Which organelle is described as the site of aerobic cellular respiration, producing ATP?
Mitochondria
Nucleus
Golgi apparatus
Lysosome
Answer: Mitochondria — Mitochondria carry out aerobic cellular respiration, using glucose and oxygen to produce ATP, the cell's immediate energy currency.
Medium
3. Why do muscle cells, which have high energy demands, typically contain large numbers of mitochondria?
Mitochondria produce the ATP that supplies the cell's energy needs
Mitochondria store large amounts of DNA needed for muscle contraction
Mitochondria are the only organelle involved in protein synthesis
Muscle cells need extra mitochondria to build their cell wall
Answer: Mitochondria produce the ATP that supplies the cell's energy needs — Since mitochondria are the site of ATP production via aerobic respiration, cells with high energy demands, such as muscle cells, contain more mitochondria to meet those demands.
