AQA GCSE: конспект по клеточной биологии

Примеры для практики

• A typical comparison answer might say that plant cells have a cellulose cell wall for support, while animal cells do not have a cell wall.
• For osmosis, use an example such as water moving into a plant cell through a partially permeable membrane when the surrounding solution is more dilute.
• For microscopy, practise converting between millimetres, micrometres, and nanometres before calculating magnification.
• For active transport, root hair cells can take up mineral ions from a dilute soil solution because energy from respiration supports movement against the concentration gradient.

Частые ошибки

• Mixing up cell membrane and cell wall functions
• Forgetting that mitochondria are the site of aerobic respiration
• Describing osmosis without mentioning water movement

Практические вопросы

• Explain how a plant cell differs from an animal cell.
• Describe how microscopy can be used to view cells more clearly.
• Compare diffusion, osmosis, and active transport.