Search over 10,000 free study notes

During the S phase of interphase, the DNA is replicated in a semi-conservative manner. The parent strands are seperated and each one is then used to synthesise a new daughter strand through the addition o...

A covalent bond is formed by a shared pair of electrons between two atoms.

For this example it would be better to use a dummy variable (a variable just to help with solving the equation but isn't a part of the final answer). Let us say our dummy variable, t = 1+x^2. So, substitu...

1. Alveoli in the mammalian lung are thin walled to allow the quick passage of gases, for example oxygen and carbon dioxide.

2. Alveoli in the mammalian lung have a large surface are...

This is a common question in C4 and the trick used to solve it is often used in sub-sections to full questions.

To solve it, we must simplify the expression in terms of cos(2x) using two trigonomet...