Y7: Cell Revision

• Biology
• Lower Secondary (Key Stage 3)

Y7: Cell Revision

Cells are the building blocks of life.

All living things (organisms), from bacteria to elephants, are made of cells.

Cells are made up of smaller parts. We call these parts sub-cellular structures or organelles.

Animal cells have 4 parts (organelles) that you need to know.

The nucleus contains DNA and controls the cell.

I know this part is the nucleus because there is only 1 and it is the biggest part inside the cell.

Which letter is pointing to the nucleus?

1. A
2. B
3. C
4. D

Which letter is pointing to the nucleus?

1. A
2. B
3. C
4. D

Which letter is pointing to the nucleus?

1. A
2. B
3. C
4. D

What is the function (job) of the nucleus?

1. Controls what enters and exits.
2. Contains DNA and controls the cell.
3. Releases energy by respiration.
4. Site of chemical reactions in the cell.

The cell membrane controls what enters and leaves the cell.

I know this part is the cell membrane because it goes all the way around the outside of the cell.

Which letter is pointing to the cell membrane?

1. A
2. B
3. C
4. D

Which letter is pointing to the cell membrane?

1. A
2. B
3. C
4. D

Which letter is pointing to the cell membrane?

1. A
2. B
3. C
4. D

What is the function (job) of the cell membrane?

1. Controls what enters and exits.
2. Contains DNA and controls the cell.
3. Releases energy by respiration.
4. Site of chemical reactions in the cell.

The mitochondria release energy for the cell to use through a process called respiration.

I know this part is the mitochondria because it is oval shaped and has folded membranes inside.

Which letter is pointing to the mitochondria?

1. A
2. B
3. C
4. D

Which letter is pointing to the mitochondria?

1. A
2. B
3. C
4. D

Which letter is pointing to the mitochondria?

1. A
2. B
3. C
4. D

What is the function (job) of the mitochondria?

1. Controls what enters and exits.
2. Contains DNA and controls the cell.
3. Releases energy by respiration.
4. Site of chemical reactions in the cell.

The cytoplasm is a gel where the chemical reactions in the cell happen.

I know this part is the cytoplasm because the arrow not pointing to a structure, but the inside of the cell.

Which letter is pointing to the cytoplasm?

1. A
2. B
3. C
4. D

Which letter is pointing to the cytoplasm?

1. A
2. B
3. C
4. D

Which letter is pointing to the cytoplasm?

1. A
2. B
3. C
4. D

What is the function (job) of the cytoplasm?

1. Controls what enters and exits.
2. Contains DNA and controls the cell.
3. Releases energy by respiration.
4. Site of chemical reactions in the cell.

Nucleus

Cell membrane

Mitochondria

Cytoplasm

Cell membrane

Nucleus

Cytoplasm

Mitochondria

Structure

Function

Controls what enters and leaves the cell.

Contains DNA and controls the cell processes.

The site of respiration.

The site of chemical reactions in the cell.

Cell membrane

Mitochondria

Nucleus

Cytoplasm

Plant cells look a bit different to animal cells.

They have all the same parts (organelles) as animal cells, plus 3 more.

This is because plants do something we cannot. They make their own food.

The cell wall protects and supports the cell. We don't need one because we have a skeleton.

I know this part is the cell wall because it is the thick, outside layer around the cell.

Which letter is pointing to the cell wall?

1. A
2. B
3. C
4. D

Which letter is pointing to the cell membrane?

1. A
2. B
3. C
4. D

Which letter is pointing to the cell wall?

1. A
2. B
3. C
4. E

Which letter is pointing to the cell membrane?

1. A
2. B
3. C
4. E

What is the function (job) of the cell wall?

1. To control what enters and exits the cell.
2. To protect and support the cell.
3. Storage of cell sap.
4. Photosynthesis.

The chloroplasts are the site of photosynthesis - the process by which plants make food.

I know this part is the chloroplast because it has a round shape and is often coloured green.

Which letter is pointing to the chloroplast?

1. A
2. B
3. C
4. D

Which letter is pointing to the nucleus?

1. A
2. B
3. C
4. D

Which letter is pointing to the chloroplast?

1. A
2. B
3. C
4. D

Which letter is pointing to the nucleus?

1. A
2. B
3. C
4. D

Which letter is pointing to the mitochondria?

1. A
2. B
3. C
4. D

What is the function (job) of the chloroplast?

1. To control what enters and exits the cell.
2. To protect and support the cell.
3. Storage of cell sap.
4. Photosynthesis.

The vacuole is a storage area for sap and helps to keep the cell rigid (stops it shrinking).

I know this part is the vacuole because it looks like a big bubble in the middle of the cell.

Which letter is pointing to the vacuole?

1. A
2. B
3. F
4. G

Which letter is pointing to the cytoplasm?

1. A
2. B
3. F
4. G

Which letter is pointing to the vacuole?

1. C
2. E
3. F
4. G

Which letter is pointing to the cytoplasm?

1. C
2. E
3. F
4. G

Which letter is pointing to the cell membrane?

1. C
2. E
3. F
4. G

What is the function (job) of the vacuole?

1. To control what enters and exits the cell.
2. To protect and support the cell.
3. Storage of cell sap.
4. Photosynthesis.

Cell membrane

Cell wall

Nucleus

Vacuole

Cytoplasm

Chloroplast

Mitochondria

Cell wall

Cell membrane

Cytoplasm

Chloroplast

Nucleus

Vacuole

Mitochondria

Nucleus

Chloroplast

Mitochondria

Cytoplasm

Cell membrane

Cell wall

Vacuole

Structure

Function

Controls what enters and leaves the cell.

Contains DNA and controls the cell processes.

The site of respiration.

The site of chemical reactions in the cell.

Storing cell sap and keeping the cell rigid.

The site of photosynthesis. Contains chlorophyll.

Protects and supports the cell.

Cell membrane

Chloroplast

Cell wall

Vacuole

Mitochondria

Nucleus

Cytoplasm