Search over 10,000 free study notes

The different types of transport across a membrane can be divided into two main categories: active and passive transport. Active transport requires metabolic energy in the form of ATP and molecules are moved...

With this question you really have to take into account how many marks you are given (in fact I'd say this is the case in most biology questions) as you want to make sure you have made one point per mark giv...

the sodium-potassium pump enables the passage of sodium and potassium ions. Both of which must be present. This uses energy as it is done via active transport. They move across their concentration gradient.

Pyruvate converts to Acetylcoenzyme A in an oxidation reaction. Pyruvate and coenzyme A combine to form acetylcoenzyme A. One of pyruvate's 3 carbon atoms goes to form a molecule of carbon dioxide, which is ...

Firstly, don't panic! These questions are always either a description of a process (so you can learn it off by heart), or an analysis of information that is given to you. Although it's not advisable to write...