Top answers

Biology
All levels

Outline how antibiotics offer protection from certain forms of infectious disease.

Ever since the accidental discovery of Penicillin by Alexandre Fleming in 1928, antibiotics have revolutionised modern medicine. Also known as 'anti-bacterials' they are used to treat often deadly bacteri...

Answered by David R. Biology tutor
4585 Views

How do neurotransmitters transmit action potentials across synapses?

The process can be broken down into 3 main stages. 1 - An Action Potential triggers Calcium Influx: when the action potential arrives at the synaptic knob of the presynaptic neurone, it s...

Answered by Trishnaah S. Biology tutor
2563 Views

What is osmosis? A diagram may be useful for your explanation

Osmosis is the passive movement of water across a semi permeable membrane from an area of high concentration to an area of low concentration.

Answered by Omar A. Biology tutor
2795 Views

Explain why a mutation in the viral RNA leads to a change in the 3D shape of the protein antigens (3 marks)

A mutation in the viral RNA results in a change in the RNA base sequences. This can result in a change in the amino acid sequence during translation. This then changes the position of intramolecular bonds...

Answered by Virad K. Biology tutor
11327 Views

What is cancer?

Cancer is a disease that occurs when cells get random changes in their genes, leading to them no longer being able to control how they grow and divide. This means the cancer cells grow and divide a lot qu...

Answered by Erin H. Biology tutor
2528 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences