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What is atherosclerosis?

Firstly, let's try to understand what 'atherosclerosis' actually means. To do that, I would recommend understanding the origin of the word. As with most specific terms in biology, the name often explains its...
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Answered by Sebastian A. • Biology tutor
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Give two structural differences between a molecule of messenger RNA (mRNA) and a molecule of transfer RNA (tRNA).

To identify the structural differences between these two molecules, its helpful to understand their roles in the building of a protein. (translation and transcription)Their roles give clues to the overall st...
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Answered by Tamara K. • Biology tutor
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Messenger RNA (mRNA) is used during translation to form polypeptides. Describe how mRNA is produced in the nucleus of a cell.

RNA polymerase scans the antisense DNA strand in the 3’ to 5’ direction, until it locates a promotor region. RNA polymerase then unwinds the DNA by breaking the hydrogen bonds between the complementary bases...
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Answered by Alexandra H. • Biology tutor
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What is an enzyme? Can you provide an example of an enzyme found in plants and describe its function? (4 marks)

An enzyme is a protein that is a biological catalyst (meaning it speeds up the rate of a reaction). The most abundant enzyme on earth, Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), is an enzyme ...
Answered by • Biology tutor
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Explain the process of tissue fluid formation

At each point along the capillary bed, fluid movement is governed by 2 forcesHydrostatic pressureWater potentialAt the arteriole endBlood is under pressure -> high hydrostatic pressure forces fluid (plasm...
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Answered by Jack W. • Biology tutor
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