An amino acid is a substituted __

Which among the following nucleotide is not present in DNA?

Which among the following is incorrect about RNA?

Which of these conditions signify an exothermic reaction?

What type of enzyme catalyzes the conversion of d-lactic acid to l-lactic acid?

What is obtained when a molecule of carbon dioxide is removed from an amino acid?

Which of these proteins is a secondary metabolite?

Identify the labeled portion of the peptide.