B: AT 2 CG 3
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What does the enzyme DNA polymerase synthesise in a cell?
21.2% of the bases in a molecule of DNA are cytosine. What percentage would be adenine?
One gene provides the code for the production of which type of molecule?
An investigation was carried out into the effect of different treatments on the permeability of the cell surface memb…
Which levels of protein structure can determine the specificity of an enzyme? 1 primary 2 secondary 3 tertiary 4 quat…
Which statements about the movement of water in and out of cells are correct? 1 Water moves from regions of more nega…