"Explain" questions — Pearson Edexcel International GCSE Biology (4BI1)
78 questions · biology · View as Markdown
How to answer
WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.
Sample questions
- Explain why oxygen moves from the air in the alveoli into the blood in the surrounding capillaries during gas exchange i…
- Muscle is a tissue found in the wall of the stomach. The stomach works together with other organs such as the pancreas a…
- Explain why carbon dioxide produced during respiration in the leaf's palisade mesophyll cells can be used directly for p…
- Explain why the rate of diffusion of oxygen into a respiring cell increases when the cell uses oxygen more rapidly.
- Explain how carbon in carbon dioxide gas in the atmosphere becomes part of the carbon compounds in the body of an animal…
- Explain how GM crops can improve food production.
- Explain how carbon stored in the bodies of dead animals is returned to the atmosphere as carbon dioxide.
- Explain why lipids are described as being made from fatty acids and glycerol, and why proteins are described as being ma…