B1
B2
B3
B4
100
What is the function of the cell membrane?
Controls entry and exit of substances.
100
Give one example of diffusion in living organisms
E.g “Oxygen diffusing into blood in the lungs.”
100
Name the elements found in carbohydrates
Carbon, Hydrogen and Oxygen
100
State the raw materials needed for photosynthesis
Carbon dioxide, water, light energy
200
Name two structures present in a plant cell but not in an animal cell.
3 e.g
Cell wall
Chloroplast
Large permanent vacuole
200
Define diffusion
The net movement of particles from an area of high concentration to an area of low concentration moving down a concentration gradient. (or along the lines of that)
200
What small units make up protein?
Amino acids
200
State the word equation for photosynthesis
Carbon dioxide + water → glucose + oxygen
300
What is the main function of the nucleus?
Controls the cell and stores the DNA
300
Define osmosis
The net movement of water molecules from a region of higher water potential to a region of lower water potential across a partially permeable membrane
300
What colour does Benedict’s solution turn if glucose is present?
Orange/brick red
300
Which test is done to detect Starch in food
The iodine test
400
How do mitochondria help the cell get energy?
They release energy from food by respiration.
400
What defines a partially permeable membrane?
Only some substances (like small molecules) can pass through the membrane.
400
What type of biomolecule are sugars and starch?
Carbohydrates
400
Where in the cell does photosynthesis happen?
In the chloroplasts
500
Is this an Animal or Plant cell? 
Animal cell
500
Describe differences between diffusion, osmosis, and active transport.
Diffusion: passive, any particles, down gradient.
Osmosis: passive, water only, through semi-permeable membrane.
Active transport: requires energy, moves particles against gradient.
500
What type of biomolecule are oils and fats?
Lipids
500
Why do leaves look green?
Because they contain chlorophyll which reflects green light.