Adenine

Cytosine

Thymine

Uracil

Thymine has a methyl group on the 5' carbon where uracil has no substitution on this carbon

Uracil has a methyl group on the 5' carbon where thymine has no substitution on this carbon

Thymine has an amino group on the 5' carbon while uracil has a methyl group at this location

Uracil has an amino group at the 5' carbon while thymine has a methyl group at this location

Uracil has a methyl group at the 5' carbon while thymine has a carbonyl group at this location

An anticodon with guanine in position one can appear with any other of the four codons to code for the same amino acid.

The anticodon sequence is located on a tRNA hairpin loop.

One possible base in position one of the anticodon is hypoxanthine.

Anticodons are antiparallel to their corresponding mRNA codon.

None of the other statements is false.

Gout is caused by excessive production of uric acid.

Fluorouracil is an effective treatment for gout.

Gout is caused by a deficiency in the enzyme xanthine oxidase.

Gout is caused by the excessive breakdown of pyrimidine bases.

cytosine . . . thymine

adenine . . . guanine

adenine . . . thymine

cytosine . . . guanine

thymine . . . guanine

The structure of thymine is identical to cytosine with the exception of one additional methyl group on carbon #5

DNA nucleotides have a maximum absorbance at

Pyrimidines have a larger structure than purines

The structure of adenine is identical to guanine with the exception of one additional amino group on carbon #2

All DNA nucleotides have tautomeric forms, and the lactim or enol form is more common

Adenine

Uracil

Thymine

Cytosine

Ribulose