I'm researching the 21 grams postulate from 1907. What can you tell me about it or refer me to in order to prove or disprove this urban myth?

I've just been reading Superhuman by Robert Winston this week and never realised that mitochondria, the power houses of our cells, produce the majority of free radicals in our body.

If radiation is so dangerous to cells, why don't they use it more for brain tumours?

Upon-Tyne - My mum is currently having chemotherapy and radiotherapy. What makes her hair fall out, and is radiotherapy worse if it's directed at one point in the body only?

I'm 24 and I was diagnosed with bladder cancer earlier this year. How did this happen? I'm only 24?

Gerard said earlier that all cells want to expand and grow and live. So why does cancer kill you? Why don't you just end up as some massive big cancerous blob that lives forever rather than die?

A while ago I was in an experiment where we were told that some people's blood fights cancer. Her idea was that once you've had an operation for cancer, you then have a blood transfusion with this blood for cancer to sort of mop up any bits that they missed. Is that still going on?

How are stem cells being used in cancer research?

I'm an A-level biology student and I'm interested in knowing how mRNA from a gene gets from the gene in the nucleus out to the right place in the cytoplasm where the protein is made.