How many carbon atoms does arachidonic acid contain?

Living organisms are made up of how many types of biomolecules?

Which of these is present in the acid insoluble pool of homogenized, strained tissue?

Which of these is a secondary metabolite?

Which nitrogenous base is not found in RNA?

Which of these compounds is not present in the acid insoluble fraction of homogenized tissue?

Which of these statements is true about the secondary structure of proteins?

What reaction is catalyzed by carbonic anhydrase?