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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...
AR
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...
IM
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
4883 Views

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...
JC
Answered by Jessica C. • Biology tutor
3686 Views

Describe the four stages of mitosis

There are four stages of mitosis: prophase, metaphase, anaphase and telophase. 1) Prophase Chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromer...
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Answered by Jessica C. • Biology tutor
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