Top answers

When should you use an apostrophe?

There are two situations when you can use an apostrophe: contractions and for possession. I will start with contractions as this is the easiest. A contraction is when you squash two words into one shorter wo...
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10532 Views

What is the fluid mosaic model?

The fluid mosaic model describes the composition and function of cell membranes. Membranes are made of lipids and proteins (and a few other bits and bobs but don’t worry about that here). The lipids and prot...
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Answered by Nick O. • Biology tutor
4556 Views

How do genes affect illness?

A gene is a segment of DNA that carries the instructions for a specific trait, such as eye colour or how well you can digest food. When DNA is damaged or is copied incorrectly this changes the gene and so th...
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Answered by Nick O. • Biology tutor
3137 Views

The UKCAT test has a lot of questions and not very long to complete them. How can I make sure I get through them all in the time allowed?

Time pressure is one of the hardest aspects of the UKCAT but luckily it is an aspect that you can train for. Practicing questions under time pressure is very important. Questions can be obtained from the UKC...
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Answered by Nick O. • UCAT tutor
2169 Views

How does ionic bonding work and what is the structure of an ionic compound?

Ionic bonds exist between metals and non metals for example sodium and chlorine. Metals have one to three electrons in their outer shell which can be transferred to a non metal. This means that the metal now...
TD
7463 Views