How many of the following are nucleotides? Adenine, Guanylic acid, Uracil, Cytidine, Thymine

Group the following as nitrogenous bases and nucleosides: Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.

Group the following as nitrogenous bases and nuclewoides: Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.

How many of the following contains carboxylic acid group? Picric acid, salicylic acid, adipic acid, saccharin.

How many of the twenty amino acids are essential amino acids for children

How many bases code for one amino acid?