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The first line of defence is the skin. This forms a physical barrier that prevents any microorganisms from getting into the body. Acid in the stomach, due to the low pH, is another defence the body has. T...

Often this particular style of question ranks amongst the most poorly answered by students. However, it is often very easy to pick up marks without any knowledge of the subject matter whatsoever. The firs...

You are related to all the humans that are currently living on the planet, even if distantly. However, you are more closely related to your first cousin than you are to a classmate of yours. This is becau...

1. This process of events is called mitosis (1)

2. Mitosis includes these stages: Interphase, Prophase, Metaphase, Anaphase, Telophase/Cytokinesis (1)

3. DNA replicati...

Bonds in a protein's tertiary structure occur entirely between the highly variable R-groups of the amino acyl residues. Firstly, hydrogen bonds further to those in the secondary structure may form between...