Which nitrogenous base is found in RNA but not in DNA?

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Question: Which nitrogenous base is found in RNA but not in DNA?

Options:

Correct Answer: Uracil

Solution:

Uracil is a nitrogenous base found in RNA, replacing thymine which is present in DNA.

Which nitrogenous base is found in RNA but not in DNA?

Which nitrogenous base is found in RNA but not in DNA?

Step 1: Understand that both DNA and RNA are made up of building blocks called nucleotides.
Step 2: Know that nucleotides contain a sugar, a phosphate group, and a nitrogenous base.
Step 3: Identify the nitrogenous bases: DNA has adenine (A), thymine (T), cytosine (C), and guanine (G).
Step 4: Identify the nitrogenous bases in RNA: RNA has adenine (A), uracil (U), cytosine (C), and guanine (G).
Step 5: Notice that thymine (T) is present in DNA but is replaced by uracil (U) in RNA.
Step 6: Conclude that uracil is the nitrogenous base found in RNA but not in DNA.

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