Which of the following characteristics of Figure 1 best shows that the fragment is RNA and not DNA?
Understand the Problem
The question is asking which characteristic of the nucleotide fragment shown in Figure 1 indicates that it is RNA rather than DNA. It presents multiple options related to the structure of nucleotides, such as orientation, identity of bases, charges, and bonding.
Answer
The identity of each nitrogenous base and the presence of OH on the 2' carbon.
The presence of the hydroxyl group (OH) on the 2' carbon distinguishes RNA from DNA.
Answer for screen readers
The presence of the hydroxyl group (OH) on the 2' carbon distinguishes RNA from DNA.
More Information
RNA is chemically distinct from DNA primarily by the presence of the ribose sugar, which has an additional hydroxyl group compared to deoxyribose in DNA.
Tips
A common mistake is overlooking the OH group on the 2' carbon, which is a definitive characteristic of RNA.
Sources
- Solved Question 5 Figure 1 represents a nucleic acid | Chegg.com - chegg.com
- From DNA to RNA - Molecular Biology of the Cell - NCBI Bookshelf - ncbi.nlm.nih.gov
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