Worksheet

1.

How does an Amoeba obtain its food?

2.

What is diffusion?

a.

A: Movement of water through a membrane

b.

B: Movement of particles from high to low concentration

c.

C: The breakdown of glucose for energy

d.

D: The process of cell division

3.

A student looks at a cell under a microscope and sees a large vacuole, a cell wall, and chloroplasts. What type of cell is this most likely to be?

a.

A: Animal cell

b.

B: Bacterial cell

c.

C: Plant cell

d.

D: Fungal cell

4.

Make a comparison and write down ways in which plant cells are different from animal cells.

5.

During cell division, what happens to the genetic material in the nucleus?

a.

A: It is destroyed and remade

b.

B: It is copied so each new cell gets a full set

c.

C: It is shared equally between the two new cells

d.

D: It moves to the cell membrane

6.

Carry out the following osmosis experiment: Take four peeled potato halves and scoos each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now, (a) Keep cup A empty (b) Put one teaspoon sugar in cup B (c) Put one teaspoon salt in cup C (d) Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe the four potato cups and answer the following: (i) Explain why water gathers in the hollowed portion of B and C.

7.

Which organelle is known as the powerhouse of the cell? Why?

8.

Which organelle controls the activities of the cell?

a.

A: Vacuole

b.

B: Ribosome

c.

C: Nucleus

d.

D: Cell wall

9.

A unicellular organism carries out all life functions in a single cell. Which of the following is an example?

a.

A: Earthworm

b.

B: Amoeba

c.

C: Fern

d.

D: Mushroom

10.

What would happen to the life of a cell if there was no Golgi apparatus?

11.

Carry out the following osmosis experiment: Take four peeled potato halves and scoos each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now, (a) Keep cup A empty (b) Put one teaspoon sugar in cup B (c) Put one teaspoon salt in cup C (d) Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe the four potato cups and answer the following: (iii) Explain why water does not gather in the hollowed out portions of A and D.

12.

A muscle cell and a skin cell in the same person contain the same DNA. Why do they look and behave differently?

a.

A: They have different amounts of DNA

b.

B: Different genes are switched on in each cell type

c.

C: Muscle cells do not have a nucleus

d.

D: They come from different organisms

13.

Carry out the following osmosis experiment: Take four peeled potato halves and scoos each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now, (a) Keep cup A empty (b) Put one teaspoon sugar in cup B (c) Put one teaspoon salt in cup C (d) Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe the four potato cups and answer the following: (ii) Why is potato A necessary for this experiment?

14.

What would happen if the plasma membrane ruptures or breaks down?

15.

Which type of cell division is required for growth and repair of body and which type is involved in formation of gametes?

16.

How is a prokaryotic cell different from a eukaryotic cell?

17.

Where do the lipids and proteins constituting the cell membrane get synthesised?

18.

What is osmosis?