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In RNA, intramolecular hydrogen bonding between complementary bases causes a single-stranded RNA molecule to fold into a characteristic what?
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7. DNA and Chromosome Structure
RNA
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In RNA such as mRNA, which nitrogenous base is present that is not found in DNA?
A
Uracil (U)
B
Thymine (T)
C
Adenine (A)
D
Cytosine (C)
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Understand the basic nitrogenous bases found in DNA: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
Recall that RNA differs from DNA in one key nitrogenous base: RNA contains Uracil (U) instead of Thymine (T).
Recognize that Uracil (U) pairs with Adenine (A) in RNA, replacing the role of Thymine in DNA.
Identify that the question asks for the nitrogenous base present in RNA but not in DNA, which is Uracil (U).
Confirm that the other bases listed (Thymine, Adenine, Cytosine) are found in DNA, so the unique base in RNA is Uracil.
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