Search over 10,000 free study notes

A sequence of three DNA nucleotide bases makes up a triplet. This triplet codes for one of 20 specific amino acids. The genetic code is universal because it is the same in all living orga...

first remember your base pairs: Adenine binds to Thymine and then Cytosine binds to Guanine. So if 28% are Adenine then 28% must also be Thymine. 28+28= 56% so 100-56 gives you the remaining percentage wh...

Blood vessels near the surface of the skin constrict to prevent heat loss to the environment and maintain blood flow around the central organs. This is called vasoconstriction. Also, skeletal muscles cont...

Mitochondria have a double membrane structure, with an inner layer with many folds to create a high surface area. This provides more space for more metabolising proteins and therefor they are able to crea...

Inhale. Internal intercostal muscles relax. External intercostal muscles contract. Ribcage moves up and out. Diaphragm contracts and flattens. Volume in lungs increases. Pressure in lungs decreases. Air m...