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In terms of chemical composition, what component is found in RNA but not in DNA?
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7. DNA and Chromosome Structure
RNA
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Which pair correctly states two basic differences between DNA and RNA?
A
RNA and DNA both contain ribose sugar and both use uracil (U).
B
RNA is always double-stranded and contains thymine (T).
C
RNA contains ribose sugar and uses uracil (U) instead of thymine (T).
D
RNA contains deoxyribose sugar and uses thymine (T) instead of uracil (U).
Guida verificata passo dopo passo1
Step 1: Understand the basic chemical components of DNA and RNA, focusing on their sugar molecules and nitrogenous bases.
Step 2: Recall that DNA contains deoxyribose sugar, while RNA contains ribose sugar. This is a fundamental difference in their sugar backbone.
Step 3: Identify the nitrogenous bases present in each molecule. DNA uses thymine (T), whereas RNA uses uracil (U) instead of thymine.
Step 4: Evaluate the statements given in the problem by comparing them to these known differences: sugar type and presence of thymine or uracil.
Step 5: Conclude which pair correctly states two basic differences by confirming that RNA contains ribose sugar and uses uracil (U) instead of thymine (T).
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