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Haemophilia is a disease that affects blood clotting. People with haemophilia are sometimes given a protein called factor VIII. Factor VIII is an enzyme that is involved in the process of blood clotting. Explain how a change in the primary structure of f

A protein is made up of amino acid subunits, in which the primary structure is the sequence of the amino acids. Therefore a change in the primary structure will result in a different sequence of amino acids....
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Answered by Naimah C. • Biology tutor
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What is the function of a cells nucleus?

GCSE Answer: The nucleus functions to store and protect the DNA within a cellA-Level Answer: The nucleus is where the DNA of a cell is stored. It is the site of transcription, where the DNA is converted to R...
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Answered by Adam R. • Biology tutor
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Describe the adaptations for efficient gas exchange in the lungs?

For efficient diffusion there must be a concentration gradient that is maintained, a large surface area to volume ration and a short distance for the gases to diffuse across. There are adaptations at the sit...
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Answered by Isla M. • Biology tutor
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Mr & Mrs Smith have a child who has Cystic Fibrosis, yet they do not personally suffer from the condition. Explain, with the use of genetic crosses, how this is possible and, if they had another child, how likely the second child will have Cystic Fibrosis

As neither of the parents have the condition, it therefore is assumed to be a Homozygous Recessive condition, so requires both the recessive alleles for the disease to be present in an individual (eg ff). As...
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Answered by Jack N. • Biology tutor
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Name 3 things that can affect the activity of enzymes

1) Temperature : increasing the temperature increases the rate of reaction, however this can only happen to a certain point as beyond each enzyme's optimum temperature they get denatured (active site changes...
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Answered by Jessica C. • Biology tutor
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