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Enzymes are biological catalysts and speed up reactions happening inside organisms.
An increase in temperature increases the rate of enzyme activity and therefore rate of reaction up to a certain po...

Biconcave shape- Increases the surface area of the red blood cell, meaning there is a greater surface over which diffusion of the gases being exchanged can occur (CO2/ O2).No nucleus- Allows red blood cel...

Protein synthesis consists of two stages- transcription and translation. Transcription takes place in the nucleus- this is where a strand of mRNA is formed. A section of DNA is unwound by...

Deoxygenated blood flows from the right ventricle to the lungs via the pulmonary artery. The contraction of the right ventricle increases the pressure within it so that it is greater than in the pulmonary...

1 mark each for one of the following:
Describe the sperm cell's function; i.e. fertilising the egg
(Proportionally large) flagellum for mobility
Possess an Acrosome filled with enzymes to p...