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Q: Describe the structure of an amino acid and the formation of a peptide bond.

Proteins are made up of organic molecules called amino acids. There are thousands of different proteins with diverse functions: storage, transport, structural support, cellular communi...

Answered by Florence M. • Biology tutor

23185 Views

What is Exocytosis?

Exocytosis is the process by which a cell secretes large substances (such as digestive enzymes or hormones) that have been produced inside the cell.

Substances produced inside the cell are...

Answered by Lucy S. • Biology tutor

12575 Views

How is an Action Potential produced in a neurone?

It is all to do with the movement of ions in and out of the neurone cell, which changes the potential difference accross the cell's membrane.

- In a neurone's resting state, the inside o...

Answered by Lucy S. • Biology tutor

4208 Views

Describe what is meant by photoperiodism

A response controlled by relative light and dark periods. The name of the receptors responsible for absorbing light are phytochromes. The photoperiodic stimulus is detected by the

Answered by Amy O. • Biology tutor

6331 Views

A stimulus (for example a pin) stimulates the receptor which causes a nerve impulse in the sensory neuron. The impulse travels to a synapse in the spinal cord, where chemicals diffuse across the gap in th...

Answered by Sophie S. • Biology tutor

10268 Views