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Why do some mutations to DNA structure not result in a change of the produced polypeptide?

This is a question which candidates would be expected to recall knowledge about the degenerate nature of the genetic code. A degenerate genetic code means that more than one codon can result in the same amin...
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How accurate is it to say that Stalin’s use of terror in the 1930s was fundamentally similar to Lenin’s use of terror in the years 1918–24?

Whilst many historians would argue that Lenin and Stalin's use of terror was markedly different in their respective presidencies, Lenin established the apparatus which enabled Stalin to enforce his political...
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Answered by Anna V. • History tutor
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The second and fourth term of a geometric series is 100 and 225 respectively. Find the common ratio and first term of the series. Round your answer to 2 d.p if necessary

Formula for a Geometric series for term n = ar n , where a = the first term and r = common ratio.Therefore, with the information given we can write that ar 2 = 100 and ar 4 = 225 , where a and r are the cons...
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What is osmosis?

To understand osmosis, first you need to understand water potential. Pure water has a water potential of 0, and as it becomes less pure (due to things dissolving in the water) the water potential goes down i...
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How does an atheroma increase the risk of death?

An atheroma is defined as fatty material in the wall of an artery. This increases the risk of a blood clot forming in the artery. If a blood clot forms in a coronary artery, which supplies the heart muscle, ...
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Answered by Melissa T. • Biology tutor
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