Remedial for Grade 7

Structure and

Function

Biology Class-Grade 7

We can observe the cells using microscope

Structure and

Function

Biology Class-Grade 7

Today’s LO:

●Identify and describe the functions of cell structures (limited to cell
membrane, cytoplasm, nucleus, cell wall, chloroplast, mitochondria and sap
vacuole).

●Describe the similarities and differences between the structures of plant
and animal cells.

What inside a cell?

cell membrane, cytoplasm, nucleus, cell wall, chloroplast, mitochondria and sap vacuole

What inside a cell?

All cells have a cell membrane.
The cell membrane is very thin and flexible.
It is like the thin skin of a soap bubble. It
lies along the inner edge of the cell wall.
The cell membrane controls what goes in
and out of the cell.

1. Cell Membrane

All cells have cytoplasm. Cytoplasm is like
clear jelly. Chemical reaction happen inside
the cytoplasm. These reactions keep the
cell alive.

2. Cytoplasm

Most cells have a nucleus. Its function is to
controls the activities of the cell.

3. Nucleus

Every plant cell has a cell wall. The cell wall
is strong and stiff. It holds the plant cell in
shape.
Plant cell walls are made of a substance
called cellulose.

4. Cell Wall

Plant cells that are in the sunlight often
contain chloroplasts. This is where plants
make their food (by photosynthesis).
Chloroplasts look green because they
contain a green pigment called chlorophyll

5. Chloroplast

All cells have mitochondria (singular:
mitochondrion). Inside mitochondria,
energy (ATP) is produced from food.

6. Mitochondrion

This is the large, fluid-filled space inside a
plant cell. The liquid inside it is a solution of
sugars and other substances dissolved in
water. The solution is called cell sap.

7. Sap Vacuole

That's all.

Let's Have a Quiz!

Multiple Choice

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

• Nucleus

• Mitochondria

• Chloroplast

• Golgi apparatus

Multiple Choice

Which organelle is responsible for storing the cell's genetic material (DNA) and control the activity of the cell?

• Nucleus

• Chloroplast

• Mitochondria

• Vacuole

Multiple Choice

In which organelle does photosynthesis occur?

• Mitochondria

• Chloroplast

• Nucleus

• Vacuole

Match

Match the following organelle of the cells to the function!

• nucleus

• mitochondria

• chloroplast

• vacuole

control cell activities

produce energy for the cell

conduct photosynthesis

store water and food for plant

• control cell activities

• produce energy for the cell

• conduct photosynthesis

• store water and food for plant

Multiple Choice

The organelle that pointed by C called?

• Mitochondria

• Chloroplast

• Cell membrane

• Sap vacuole

Multiple Choice

What is the function of the cell membrane?

• To produce energy

• To store nutrients

• To control what enters and leaves the cell

• To break down waste

Open Ended

Why do you think plant cells have chloroplasts, but animal cells do not?

Labelling

Please give the label for the part of the cell that pointed by number 2, 5, and 7. Make it in order.

Drag labels to their correct position on the image

mitochondria

nucleus

cell membrane

Drag and Drop

Below are the organelle that can not be found in animal cell.​

Placeholder

​

Drag these tiles and drop them in the correct blank above

chloroplast

nucleus

endoplasmic reticulum

mitochondria

Multiple Choice

True or False: The cell membrane is a rigid structure that provides support to the cell.

• FALSE

• TRUE

Match

Match the following organelle with the function.

• Nucleus

• Mitochondria

• Cell membrane

Controls cell activities & contains DNA

Produces energy for the cell

Protects the cell and regulates what enters and exits

• Controls cell activities & contains DNA

• Produces energy for the cell

• Protects the cell and regulates what enters and exits

Multiple Choice

True or False: Both plant and animal cells have cell walls.

• TRUE

• FALSE

Multiple Choice

Vacuoles are typically larger in animal cells than in plant cells.

• FALSE

• TRUE

That's all.