iStarSign inScience 7 · Unit 1: Cells · Cambridge Lower Secondary Science Stage 7
1.1 Plant cells
17 questions · e.g. Where does photosynthesis happen?
Questions
- Check
2. Which part of a plant cell is a thin layer that lets some substances in and out but stops others?
Check3. Which part of a plant cell is a jelly where many of the cell's chemical reactions happen?
Check4. Which part of a cell releases energy from food by respiration?
Check5. Which part of a plant cell holds the instructions that control everything the cell does?
Check- Check
7. Which green part of a leaf cell captures light energy to make food?
Check8. Match each part of a plant cell to its job.
Check- nucleus
- chloroplast
- cell wall
- sap vacuole
- makes food using light
- supports the cell and keeps its shape
- stores cell sap
- controls the cell
9. Marcus's label lines stop just before the parts they name. Why is this a problem?
- Label lines must always have arrowheads.
- The labels will be too far from the drawing.
- Nobody can be sure which part each label is naming.
- The drawing will look too small.
10. Marcus's drawing of a plant cell has shaded, coloured parts. What should he do instead?
- draw the parts with clear single pencil lines and no shading
- draw the outline in pen and the inside in pencil
- colour each part so it is easy to tell apart
- shade the nucleus darker so it stands out
11. Which list gives good rules for a biological drawing?
- use a pen, add colour, let label lines cross if needed
- draw only the nucleus, use arrows for labels, add shading
- draw it as large as possible, shade the dark parts, write labels inside each part
- get the shapes and sizes right, use a ruler for label lines, keep the labels outside the drawing
12. Marcus labels his drawing of a plant cell. Where should he write the labels?
- on the drawing, wherever there is space
- in a list under the drawing, with no label lines
- inside each part of the drawing
- outside the drawing, written straight across and lined up neatly
13. Look at plant cells A and B. Plant cell A has many chloroplasts. What about plant cell B?
- It has the same number of chloroplasts as A.
- It has no chloroplasts.
- It has chloroplasts but no cell wall.
- It has more chloroplasts than A.
14. Look at plant cells A and B. How are their shapes different?
- Both cells have exactly the same shape.
- A has no fixed shape, but B has a cell wall.
- A is round, but B is long and box-shaped.
- A is long and box-shaped, but B is short and many-sided.
15. Look at plant cells A and B. How are their sizes different?
- Plant cell B is bigger than plant cell A.
- They are the same size.
- Plant cell A is bigger than plant cell B.
- Plant cell B is twice as long as plant cell A.
16. Look at plant cells A and B. Which cell comes from a leaf?
- B, because it is smaller
- A, because it has many chloroplasts to make food using light
- A, because it has a cell wall
- B, because it has no chloroplasts
17. Cells from the inside layer of an onion bulb do not look green under a microscope. Why?
- All the chloroplasts dissolved in the water on the slide.
- An onion bulb grows underground, so its cells do not photosynthesise.
- The chloroplasts are hidden inside the nucleus.
- Onion cells are animal cells.