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What colour does a positive iodine test go?
Red
Green
Black
Yellow
What colour does a positive Benedict's test go?
White
Black
Purple
Brick red
What colour does a positive biuret test go?
Blue
Violet purple
Pink
What does biuret test for?
The presence of proteins
The presence of lipids
The presence of starch
What does Benedict's test for?
Sugars
Proteins
Lipids
What is the function of the liver?
Stores carbohydrates
Stores lipase
Digests food
Produces bile
What is the function of bile?
It emulsifies fats and neutralises stomach acid pH
It coats the small intestine to improve absorption
It breaks down lipids into fatty acids and glycerol
What is an enzyme?
A carbohydrate
An active site
A biological catalyst
A lock and key
What happens to an enzyme in high temperatures?
The active site denatures
It changes
It dies
What are the upper chambers of the heart called?
Atria
Ventricles
Which blood vessel carries oxygenated blood from lungs to heart?
Pulmonary artery
Pulmonary vein
Aorta
Vena cava
Which blood vessel carries deoxygenated blood from body to heart?
Aorta
Pulmonary Vein
Vena cava
Pulmonary Artery
Which of these has walls only one cell thick?
Vein
Artery
Capillary
What is the function of platelets?
Transport
Fight disease
Clotting
What is the function of white blood cells?
The liquid portion of the blood
To clot the blood
Carry oxygen
To defend against pathogens
What is the function of red blood cells?
The liquid portion of the blood
To carry oxygen
To defend against pathogens
To cloth the blood
