Top answers

What is cancer?

For many reasons cell division can become unregulated. This leads to the formation of a mass of cells called a tumour which cannot perform their normal function – they are said to be undifferentiated. In som...
RA
Answered by Rohin A. • Biology tutor
5250 Views

Briefly describe the components of blood and their functions.

55% of blood is made up of plasma. This liquid component holds the other component of blood, cells, in suspension and thus is vitally important to their transport. Plasma is also important in transporting no...
BG
Answered by Benjamin G. • Biology tutor
10875 Views

In DNA, if you know the percentage of a base on 1 strand, how do you work out the bases on the opposite strand?

This questions requires knowledge of the base pairing in DNA, plus a little bit of maths! As you know, bases on the 2 DNA strands always pair in the same way: A (adenine) with T (thymine) , C (cytosine) with...
EB
Answered by Eleanor B. • Biology tutor
15248 Views

Are diffusion and osmosis the same thing?

Diffusion is defined as the movement of a substance from a high concentration to a low concentration, meaning they move from where there are lots of them to where there are fewer. Diffusion of these molecule...
EB
Answered by Eleanor B. • Biology tutor
8500 Views

I've tried to learn all my notes, but what is the best way to prepare for the exam?

It's fantastic if you manage to learn all your notes before the exam, but knowledge isn't everything. It's also about how you apply the knowledge. I would recommend getting to grips with the syllabus, and pa...
NT
Answered by Nicholas T. • Biology tutor
4348 Views