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What is epigenetic control of gene expression? How does it occur?

Strictly speaking, it is the heritable changes in the function of your genes that do not involve a change in your DNA's base sequence. Simply put, it is the way in which we regulate whether a gene is transcr...
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Answered by Fareema F. • Biology tutor
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How is blood glucose concentration controlled by hormones?

The three main hormones to consider are: insulin, glucagon, and adrenaline. All three act on receptors on their target cells. Insulin results in the mobilisation of channel proteins in cell vesicles that are...
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Answered by Fareema F. • Biology tutor
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When analysing poetry, how do we approach a text without feeling overwhelmed?

There's no one right answer to this, but if you're stuck on a poem, a simple method of analysis and unpicking might be of help. Firstly, take a moment to read the whole poem before you begin analysing. It wi...
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What is the cAMP cascade and where does it occur?

The cAMP cascade describes an intracellular process that occurs upon activation of glucagon and adrenaline receptors. Glucagon receptors are present mainly in the liver , where they activate enzymes that con...
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Answered by Fareema F. • Biology tutor
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f(x) = 2 / (x^2 + 2). Find g, the inverse of f.

Rewrite as y = 2 / (x^2 + 2). Swap all x and y symbols to create x = 2 / (y^2 + 2). Rearrange for y to reach y=g(x)=sqrt( (2-2x) / x ).
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Answered by Alfie R. • Maths tutor
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