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What are gene mutations?

A mutation is any change to the base sequence of DNA.

The different types of mutations that can occur include:

Subsitution - this is where one base is swapped for another

Delet...

Answered by Lauren G. • Biology tutor

5775 Views

How are the human lungs specialised for gas exchange?

Gas exchange is when oxygen is transferred from the air in the lungs to the blood and carbon dioxide is transferred from the blood to the air in the lungs. It occurs in the alveoli of the lungs.The lungs ...

Answered by Anna D. • Biology tutor

24811 Views

What is endosymbiosis and how does it relate to mitochondria?

Endosymbiosis is where two organisms live together, one inside the other: endo=in, sym=together and biosis=living.

Answered by Aidan H. • Biology tutor

5191 Views

Describe the structure of the cell membrane

The cell membrane is made up of something called the phospholipid bilayer. This is exactly what it sounds like:a hydrophilic phosphate head on the outside and a hydrophobic lipid on the inside.

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Answered by Thomas W. • Biology tutor

5860 Views

How is a message transferred across a synapse?

A synapse is a junction between the end of one neuron (known as the pre-synaptic neuron) and either another neuron (known as the post-synaptic neuron) or...

Answered by Max B. • Biology tutor

12718 Views