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exchange surfaces require a small diffusion distance enabling the fast exchange of compounds, good blood supply to maintain a concentration gradient. This allows for the most efficient diffusion

The major difference between both of these processes is why they are used, DNA replication is used for cell division in the S phase of the cell cycle. mRNA transcription is used in protein synthesis and t...

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 aci...

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 t...

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 ...