Upper Primary Science Cells Worksheet - Free Printable

Let’s go through each question step by step.

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Question 1(i): How is this cell similar to a cheek cell? List two similarities.

We’re looking at an amoeba — it’s a single-celled organism. A cheek cell is also a single animal cell (from inside your mouth). Both are animal cells, so they share basic parts:

- They both have a cell membrane (the outer layer that holds the cell together).
- They both have a nucleus (the control center of the cell, which holds genetic material).

Also, neither has a cell wall or chloroplasts — but since the question asks for similarities, we’ll stick with what they *do* have in common.

✔ Two similarities:
1. Both have a cell membrane.
2. Both have a nucleus.

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Question 1(ii): How does this organism reproduce?

Amoebas are unicellular organisms. They don’t need a partner to reproduce. They split into two identical copies of themselves. This is called binary fission.

So, the answer is:
→ It reproduces by splitting into two equal parts (binary fission).

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Question 1(iii): Will the cell be able to make food on its own? Explain.

To make its own food, a cell needs chloroplasts (like plant cells do for photosynthesis). Amoebas are animal-like — they don’t have chloroplasts. Instead, they eat other tiny things (like bacteria) by wrapping around them.

So, no — it cannot make its own food.

✔ Answer: No, because it doesn’t have chloroplasts. It gets food by eating other small organisms.

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Question 2: The following cells do not carry genetic information. Explain why.

The image shows red blood cells (they look like little red discs). In humans and many animals, mature red blood cells lose their nucleus when they grow up. Since the nucleus holds the DNA (genetic information), these cells don’t have any genetic info anymore.

Why? So they can carry more oxygen — less space taken up by nucleus = more room for hemoglobin.

✔ Explanation: These are red blood cells. When they mature, they lose their nucleus, so they don’t have DNA or genetic information.

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Question 2(i): Are the cells animal or plant cells? Explain your answer.

Red blood cells are found only in animals. Plant cells have cell walls and chloroplasts — these cells don’t. Also, plants don’t have red blood cells at all!

✔ Answer: Animal cells. Because they are red blood cells, which are only found in animals, and they lack cell walls and chloroplasts.

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Final Answer:

1(i)
- Both have a cell membrane.
- Both have a nucleus.

1(ii)
It reproduces by splitting into two equal parts (binary fission).

1(iii)
No, because it doesn’t have chloroplasts. It gets food by eating other small organisms.

2
These are red blood cells. When they mature, they lose their nucleus, so they don’t have DNA or genetic information.

2(i)
Animal cells. Because they are red blood cells, which are only found in animals, and they lack cell walls and chloroplasts.