(a) (i) Give a biological molecule that contains: 1. nitrogen 2. phosphorous (ii) Describe the role of microorganisms in producing nitrates from the remains of dead organims.
(i) 1. amino acid 2. DNA(ii) Decomposer microrganisms break down dead material into ammonia. Ammonia is then converted into nitrite and then oxidised to nitrate by nitrifying bacteria. The process is known as nitrification.
AS
Related Biology A Level answers
All answers ▸Why does a base substitution in DNA not always result in the formation of non-functional proteins?
What are the different types of RNA used for during translation?
How do sodium and potassium ions travel through the cell membrane?
Explain what the stages of protein folding are and how the protein is held in its 3D shape