Test yourself
Boss quiz
10 questions on the whole topic. You get one try at each.
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These cells have neat, regular shapes. Which part gives them that shape?
- Cell wall
- Cytoplasm
- Nucleus
- Mitochondria
Which part is found in both animal and plant cells?
- Chloroplasts
- Cell wall
- Cell membrane
- Vacuole
Where does respiration happen?
- Nucleus
- Mitochondria
- Vacuole
- Cell wall
The eyepiece lens is ×10 and the objective lens is ×10. What is the total magnification?
- ×10
- ×20
- ×1000
- ×100
Why do we add iodine to an onion cell slide?
- To make the cells bigger
- To stop air bubbles
- To make the cell parts show up
- To kill the cells
What is the job of these cells?
- Absorb water
- Carry oxygen
- Make food
- Carry electrical signals
In diffusion, particles move from…
- high concentration to low concentration
- plants to animals
- hot places to cold places
- low concentration to high concentration
Which of these is an organ?
- Red blood cell
- Circulatory system
- Muscle cell
- Heart
What helps a root hair cell absorb lots of water?
- Chloroplasts
- A large surface area
- No nucleus
- A tail
This is an amoeba. How many cells is it made of?
- Two
- Millions
- One
- Hundreds
Answers
- Cell wall. The tough cell wall holds each plant cell in shape.
- Cell membrane. Every cell has a cell membrane. The other three are plant-only.
- Mitochondria. Mitochondria release energy by respiration.
- ×100. Multiply the two lenses: 10 × 10 = ×100.
- To make the cell parts show up. Iodine is a stain. It adds colour so you can see the parts.
- Carry oxygen. They are red blood cells. They carry oxygen around the body.
- high concentration to low concentration. They spread out from where there are lots to where there are few.
- Heart. The heart is made of different tissues working together.
- A large surface area. Its long thin hair gives more surface for water to pass through.
- One. An amoeba is unicellular. One cell does every job.