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Answer: 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.

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

The nitrogenous base you cant use during replication is Uracil.

  • There are five types of nitrogenous bases in the DNA/RNA structure. For DNA, we have adenine, cytosine, guanine and thymine.
  • For RNA, we have Uracil in place of thymine and the other three.
  • As replication occurs in the DNA and involves creating another DNA, we cant use the uracil nitrogenous base but thymine.
  • Learn more: https://brainly.com/question/18644294

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