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How should I structure my essay in an exam?

The first five minutes of your exam are key to writing a good exam essay. It might seem obvious, but read the question a few times before you begin planning. I recommend underlining the most important words ...
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What is the key difference between the rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER)?

The RER is associated with translation of proteins, including protein folding. It is known as 'rough' because it is has ribosomes immersed in it, which makes it easy to remember the protein function. The SER...
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Answered by Ivan S. • Biology tutor
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Humans have reflexes. Describe the route of an impulse through a reflex arc.

First of all, the IMPULSE IS DECTECTED by receptors.SENSORY neurone passes impulse onto RELAY NEURONE in SPINAL CORD.RELAY neurone passes impulse onto MOTOR neuroneMOTOR neurone passes impulse to EFFECTOR MU...
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Answered by Ozbil D. • Biology tutor
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Describe the role of the myelin sheath surrounding the axon

It is important to remember that the myelin sheath is essential for our nervous system.It forms a layers of fatty material around the axon. This allows INSULATION, which, in turn, allows quicker conduction o...
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Answered by Ozbil D. • Biology tutor
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What are the key principles of evolution?

Variation: there is variation in the physical and behavioural characteristics of a set of organisms. This variation is caused by a combination of genetic and environmental factors. Inheritance: there is a me...
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Answered by Ivan S. • Biology tutor
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