Which of the following is not one of the nitrogen bases that form the rungs of the ladder in DNA? a. adenine 2. cytosine 3. francine, 4. guanine

3 francine

Explanation:

The four nitrogenous bases that compose DNA nucleotides are shown in bright colors: adenine (A, green), thymine (T, red), cytosine (C, orange), and guanine (G, blue). francine is not one of them

3. francine

Explanation:

thymine (T), adenine (A), cytosine (C), and guanine (G) thymine are the rungs of the DNA ladder.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides