Top answers

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 stimulates voltage-ga...
TS
Answered by Trishnaah S. • Biology tutor
4023 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.
OA
Answered by Omar A. • Biology tutor
3872 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, s...
VK
Answered by Virad K. • Biology tutor
13214 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 quick...
EH
Answered by Erin H. • Biology tutor
3560 Views

Describe the process of oxidative phosphorylation

There are four main electron carrier protein complexes in the inner mitochondrial complex, which use the energy from the transfer of electrons to pump H+ into the intermembrane space, this is known as the el...
TB
Answered by Thomas B. • Biology tutor
4726 Views