Top answers

Biology
A Level

Why would a cell lyse when it's in water?

Lysis, or the bursting of a cell, happens because of a cell swelling excessively causing it to burst, due to the movement of water into the cell by osmosis. However, this isn't the case for all cells!

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Answered by Ashar A. Biology tutor
18102 Views

What is the role of the nucleus?

The nucleus is the most important organelle of the cell and acts like a blueprint for how all the cells in your body function. The nucleus also acts as a vault to hold the DNA securely.
The main func...

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Answered by Ameliya D. Biology tutor
33977 Views

What is the difference between a competitive and a non-competitive inhibitor?

Inhibitors are molecules that stop substrates from being able to bind to their enzymes, and therefore inhibit the action of specific enzymes. A competitive inhibitor is an inhibitor which has a si...

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Answered by Sreya C. Biology tutor
22535 Views

How are action potentials generated in a neuron?

A stimulus at the receptor end of the neuron causes the membrane to become more permeable to Na+ ions. Because there is a higher concentration of Na+ on the outside of the cell the flood into the cell dow...

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Answered by Alexander N. Biology tutor
5033 Views

Suggest how the two sub-species have developed from a single ancestral population.

Two populations become separated by a barrier such as sea (geographical separation). As a result populations cannot interbreed, hence gene flow between two populations is prevented. As a consequence, only...

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Answered by Maja S. Biology tutor
3112 Views

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