Search over 10,000 free study notes

There are three blood vessel types in humans: arteries, veins and capillaries.Arteries pump blood away from the heart (easy point to remember - "A" in arteries = AWAY from the heart) while veins...

Water has adhesive properties which allow the polar water molecules to adhere to other hydrophilic surfaces such as cellulose. This aids the movement of water through xylem vessels in plants. Water also h...

Endosymbiotic theory explains the origin of eukaryotic cells. Eukaryotes (cells that contain membrane bound organelle) are believed to have evolved from prokaryotic cells (unicellular organism that lacks ...

Translation involves three main steps; initiation, elongation and termination.Initiation begins when a mRNA (messenger RNA) binds to the small of the sub unit of the ribosome, where it moves to the start ...

After the cell has carried out the process of DNA transcription, we are left with a transcribed mRNA fragment. This, similar to DNA, is a chain of 4 different bases - cytosine, guanine, adenine and uracil...