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What is a logarithm?

Logarithms, written in the form log x y, are another type of mathematical 'operation', just like addition or multiplication. Subtraction as the opposite of addition, division is the opposite of multiplicatio...
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Answered by Laurie H. • Maths tutor
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Assess the view that grievances over taxation were the most important factor in bringing about the American Revolution.

Historian Justin du Rivage’s view that economic grievances were the main factor in bringing about the Revolution is the most compelling. Rivage argues that whether or not colonists wished to revolt “turned o...
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Answered by Francis Z. • History tutor
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What are the model structures associated with enzyme action?

There are two different models theorized by scientists in order to explain the performance of enzymes that you need to know about. The first is known as the 'Lock and Key hypothesis' where in the enzyme is a...
Answered by • Biology tutor
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Explain the transmission of nerve impulses across a cholinergic synapse

When an action potential arrives at the pre-synaptic neurone, it causes a change in voltage due to the presence of positive Na ions. This causes voltage-gated Ca 2+ protein channels to open and allow calcium...
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Answered by Kimran S. • Biology tutor
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Describe the structure and function of the cytoskeleton

An organelle found in all eukaryotic cells made of thin microfilaments of the protein actin and microtubules made of the protein tubulin. Transport is the key role where motor proteins drag organelles from o...
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Answered by Sakina L. • Biology tutor
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