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The main role of white blood cells is to protect the body against invasion by disease-causing microorganisms (pathogens), such as bacteria or viruses. They do this in 2 main ways: phagocytosis and antibod...

Glycogen levels are expected to increase in the liver after a meal. This is due to the digestion of the meal leading to an increase in blood sugar levels, triggering insulin release from the pancreas. Ins...

Enzymes are proteins, which are made up of long chains of aminoacids. Proteins have a primary structure (the sequence of aminoacids in the chain), a secondary structure (specific 3D shapes of the chain fo...

This is a very common type of question that might be asked in an exam and there are 3 methods we could use to solve this; by substitution, by elimination (or subtraction) or by using straight line graphs....

BIDMAS 

Following BIDMAS, multiply the bracket out before the addition of the 2y.

3y(5y+3) = 15y²+9y 

adding the 2y gives the calculation of 15y² + 9y +2y = 15y<...