Year 9 AC2 revision lessons

• Science
• Lower Secondary (Key Stage 3)

Year 9 AC2 revision lessons

Why do plant cells have chloroplasts?

What do eukaryotes have that prokaryotes do not?

DNA

Cell membranes

Cell wall

Nucleus

Ribosomes

Mitochondria

Respiration takes place here. Generating energy for cellular activities.

Nucleus

Controls the functions of the cell. Contains the D.N.A

Cytoplasm

Where cellular reactions take place. 

Ribosomes

This is the site of protein synthesis.

Cell membrane

This controls the movement of substances in and out of the cell.

Cell wall

This provides structure and protection for the cell. Present in plant and bacterial cells.

Plasmid

This is an additonal circular piece of DNA that can transfer genetic material from one cell to another. 

String of DNA

DNA is not contained in a nucleus but is wound in a loop. 

Contains the DNA, controls the cell.

Absorbs energy from sunlight to use in photosynthesis. 

Controls which materials can come into and out of the cell

Supports and protects the cell. Also found in bacterial cells.

Provides energy for the cell from respiration of glucose.

Contains the cell sap.

Where cellular reactions take place.

Which part do bacterial cells and plant cells have that animal cells do not?

Nucleus

Cell membrane

Cytoplasm

Chloroplast

Cell Wall

Which of the below contains cell sap to push the chloroplasts to the outer edges of the cell.

1. Cytoplasm
2. Vacuole
3. Chloroplast
4. Mitochondria

Which of the below controls what enters and leaves the cell?

1. Cell wall
2. Ribosomes
3. Cell membrane
4. Nucleus

Water goes into root hair cells by...

1. Osmosis
2. Diffusion
3. Active Transport

Which does not require a cell membrane to occur?

1. Osmosis
2. Diffusion
3. Active Transport

What is the function of the cell membrane?

1. To keep the shape of the cell
2. To store chemicals
3. To release energy
4. To control what goes in and out of the cell

A plant cell has a cell membrane.

1. True
2. False

How do you calculate magnification?

Tell me 4 facts about Enzymes.

Enzymes are....

Catalysts

Biological catalysts

Chemical substrate

Enyzmes are biological                      . They                     the rate of a reaction without being used up in the process. Each enzyme is                      to one substrate as only that substrate's shape fits the enzyme's                                .

catalysts

increase

decrease

specific

active site

reaction

inactive

Osmosis

Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell’s partially permeable membrane.

What key group of proteins speed up chemical reactions in cells and are affected by temperature?

1. enzymes
2. antibodies
3. hormones
4. receptors

Water goes into root hair cells by...

1. Osmosis
2. Diffusion
3. Active Transport

Root hair cells absorb minerals up their concentration gradient by...

1. Osmosis
2. Diffusion
3. Active Transport

Which requires energy to occur?

1. Osmosis
2. Diffusion
3. Active Transport

Which of these is how oxygen moves into the blood from the alveoli?

1. Osmosis
2. Diffusion
3. Active Transport

In osmosis water moves across a _____________ ___________ membrane.

Which of these processes is involved in regulating the amount of water in your urine?

1. Osmosis
2. Diffusion
3. Active Transport