Primary 6 · Science · Systems: Cells
Systems: Cells questions for Primary 6 Science
9 questions to work through online, 2 of them written out the way the paper asks. Answer and you get the working straight away, then a score at the end. No sign-up, and you can retake it as often as you like.
- Negative questions
- Identifying a root cell
- Parts and their jobs
- Cells and organisms
- Reasoning about a specialised cell
- Plant against animal cells
- Naming a level
- Naming a part
- Applying the ideas
| Part of cell | X | Y | Z |
|---|---|---|---|
| cell membrane | ✓ | ✓ | ✓ |
| nucleus | ✓ | ✓ | ✓ |
| cell wall | ✗ | ✓ | ✓ |
| chloroplast | ✗ | ✓ | ✗ |
Same picture as the question above.
| Part of cell | X | Y | Z |
|---|---|---|---|
| cell membrane | ✓ | ✓ | ✓ |
| nucleus | ✓ | ✓ | ✓ |
| cell wall | ✗ | ✓ | ✓ |
| chloroplast | ✗ | ✓ | ✗ |
Answers and explanations for all 9 questions
Every answer with the reasoning behind it. Worth reading after you have tried the set — or on its own, if you are a parent marking it.
Based on the table above, which one of these statements is INCORRECT?
Answer: Z can make its own food.
Z has a cell wall but no chloroplast, so it is a plant cell that cannot photosynthesise — a root cell, for instance. Saying it can make food is the incorrect statement.
Using the same table, which part of a plant is Z most likely taken from?
Answer: the root
A cell wall makes it a plant cell; no chloroplasts means it never sees light. That combination points to a root.
Which two pairs correctly match a cell part to its job?
Answer: A and B only
The nucleus is the control centre and the membrane is the gatekeeper. The other two options swap the cell wall's and the chloroplast's jobs.
What is the correct order, from smallest to largest, of the way a body is built up?
Answer: cell, tissue, organ, system
Similar cells make a tissue, tissues make an organ such as the stomach, and organs working together make a system.
A root hair cell has a long thin extension into the soil. What does this help it do?
Answer: take in more water, because it has a larger surface touching the soil
The whole point of the extension is surface. A long thin projection touches far more soil than a rounded cell would, so water enters faster.
Which two features would tell you a cell came from a plant rather than an animal?
Answer: A and B only
Only plant cells have cell walls and chloroplasts. Nuclei and membranes are in both, so neither can tell them apart.
A group of similar cells working together to do one job, such as muscle, has a name. What is this level called?
Answer: tissue
A group of similar cells doing one job is a tissue.
In the table above, one part is present in X, Y and Z, and it controls everything the cell does. What is it called?
Answer: nucleus
The part in all three that controls the cell's activities is the nucleus.
Why is a red blood cell's shape — a flattened disc with a dip in each side — useful?
Answer: It gives a large surface for taking up oxygen relative to its size.
Oxygen enters across the surface, so a shape with a lot of surface for its volume loads and unloads faster than a sphere would.