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What is an atheroma and how can it lead to a heart attack?

Atheroma = Formed of a hard fibrious plaque containing fatty streaks that have hardened over time (through damage such as high blood pressure). There is a build up of cholesterol and other insoluble lipids c...
KL
Answered by Keeley L. • Biology tutor
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Using mendelian genetics, explain how two brown eyed parents can have a blue eyed child. Which of the alleles is dominant? You may use a graph to support your explanation (Tip: Assume a simple dominance and inheritance )

Given that the brown eyed parents are able to produce blue eyed offspring, it is safe to assume that they are both heterozygots for eye colour and that the brown allele is dominant (A) over the blue allele (...
JT
Answered by Jeremy T. • Biology tutor
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Describe the process of glycolysis

Glycolysis occurs during both aerobic and anarobic respiration in the cytoplasm of the cell in both plants and animals. One glucose molecule is broken down into two molecules of pyruvate releasing 4 molecule...
TR
Answered by Taqua R. • Biology tutor
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Describe the structure of a protein.

Proteins are large biomolecules which play a key role in many of the body's proccesses. Their structure can be broken down into 4 main domains. The primary structure consists of a unique sequence of amino ac...
TD
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A drug used in a scientific trial is a competitive inhibitor of the elctron transport chain in the light dependent reaction, what affect will this have on the amount of glucose synthesised by the plant? (4 marks)

1- The drug has a similar shape to the substrate which is complementary to the active site of the electron transport chain proteins. 2- Competitive inhibition stops the transfer of electrons, coming from the...
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Answered by Sam P. • Biology tutor
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