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How does muscle contraction work?

So the muscle is made up of 2 muscle filaments, a thick filament called myosin and a thin one actin. This can be remembered by actin having 2 syllables which is less than myosin which has 3 so actin is thinn...
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Answered by Sonam T. Biology tutor
9314 Views

Describe and explain the Nitrogen Cycle.

For a question like this it is very useful to draw a diagram of the cycle linking to where it occurs to aid visual learning and retention of each stage. For example, I like to teach this by showing the cycle...
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Answered by Lucy W. Biology tutor
16076 Views

What is the purpose and structure of a cell membrane?

The purpose of the cell membrane is to make the cell into a closed compartment that is separate from the extracellular (outside) environment. It also works as a selective barrier that can allow the import or...
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Answered by Olivia L. Biology tutor
3814 Views

What is the difference between genotype and phenotype?

In genetics, traits such as eye colour, sex and skin colour are carried in genes. Taking eye colour as an example, you will have a gene located somewhere within a chromosome encoding for eye colour. This gen...
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Answered by Andrea D. Biology tutor
6372 Views

How does the lac operon work?

The lac operon has 3 components: the promoter (Binding site for RNA polymerase), the operator (binding site for the repressor) and the structural genes that code for the enzymes required for lactose metaboli...
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Answered by Elena B. Biology tutor
21085 Views