Answer:
The nitrogenous bases present in DNA are purine (adenine or guanine) and pyrimidine (cytosine or thymine). Uracil is absent from DNA. Uracil is present as pyrimidine base in ribonucleotides which are components of RNA.
Answer:
Introns
Explanation:
Introns do not code for any protein and are removed from the mRNA before it is made into protein