Which nitrogen base can’t you use during replication

Nitrogenous bases are part of the backbone of the DNA/RNA structure themselves.

The nitrogenous base you cant use during replication is Uracil.

Uracil

Explanation:

DNA undergoes replication, by splitting it's double stranded parent DNA. Once splitted the enzyme DNA polymerase help to produce complimentary bases such as thymine, adenine, cytosine and guanine.

Thus, all except for uracil is used in replication.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

we would need to see the picture to answer it