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AQA GCSE · Question 07.1 · Cell Biology
This question is about cells and transport.
Complete Table 5.
This question is about cells and transport.
Complete Table 5.
How to approach this question
1. **Row 1:** The function is "Contains genetic information". Which part of the cell holds the DNA/chromosomes?
2. **Row 2:** The cell part is "Mitochondria". What is the main function of mitochondria? Think about energy.
3. **Row 3:** The function is "Controls the movement of substances into and out of the cell". Which part of the cell acts as a barrier and controls what enters and leaves?
Full Answer
Row 1: Nucleus
Row 2: Site of aerobic respiration / releases energy
Row 3: Cell membrane
This question tests your knowledge of the functions of different organelles (parts of a cell).
- **Nucleus:** The nucleus is the control centre of the cell and contains the genetic material (DNA) in the form of chromosomes. So, the part that "contains genetic information" is the **nucleus**.
- **Mitochondria:** These are the sites of aerobic respiration. During respiration, glucose is broken down to release energy in the form of ATP, which powers the cell's activities. So, the function of mitochondria is to **release energy** or be the **site of respiration**.
- **Cell membrane:** This is a partially permeable barrier that surrounds the cell. It controls which substances can pass into and out of the cell. So, the part that "controls the movement of substances" is the **cell membrane**.
Common mistakes
✗ Confusing the cell wall with the cell membrane. The cell wall provides structural support (in plants) but does not control movement of substances in the same way.\n✗ Saying mitochondria "create" or "produce" energy. Energy cannot be created, only transferred or released from chemical stores like glucose.
Practice the full AQA GCSE Biology Foundation Tier Paper 1
60 questions · hints · full answers · grading
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