(i) Name two biologically important compounds that contain both oxygen and nitrogen. (ii) What is the role of nitrogen fixing ‘bacteria'?

CBSE Class 9 CBSE Class 9 Science
1

(i) (a) Nucleic acids (DNA and RNA)
(b) Proteins
(ii) Nitrogen fixing bacteria are found in root nodules of legumes and they convert atmospheric nitrogen into soluble nitrates and nitrites.