S4.1.1 For the adult
Cell structure in detail
A leaf and my skin are both made of cells. How can their cells be so different?
What this chapter teaches
Plant and animal cells share a nucleus, mitochondria and ribosomes. Plant cells add a cell wall, chloroplasts and a permanent vacuole. Bacterial cells have no nucleus: their DNA is a loop in the cytoplasm.
Three questions to ask
There is no one right wording. Listen for the idea.
- Which part of a cell releases energy from food, and which makes proteins?
- What can a plant cell have that an animal cell cannot?
- Why do root cells not have chloroplasts?
After the chapter, the learner can
- Describe the jobs of mitochondria, ribosomes and the nucleus
- Compare plant, animal and bacterial cells
What they copy into their notebook
Nucleus: holds DNA, controls the cell. Mitochondria: aerobic respiration, releasing energy. Ribosomes: make proteins. Plant cells add a wall, chloroplasts and a vacuole. Bacteria: no nucleus, a DNA loop.