Scelta multipla
In most biological contexts, how many strands does RNA have?
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7. DNA and Chromosome Structure
RNA
Scelta multipla
Which statement correctly describes how RNA differs from DNA?
A
RNA is usually single-stranded and contains deoxyribose sugar but uses uracil (U) instead of thymine (T).
B
RNA is usually double-stranded, contains deoxyribose sugar, and uses thymine (T) instead of uracil (U).
C
RNA is usually single-stranded, contains ribose sugar, and uses uracil (U) instead of thymine (T).
D
RNA contains ribose sugar but uses thymine (T) instead of uracil (U).
Guida verificata passo dopo passo1
Recall the structural differences between DNA and RNA, focusing on strand number, sugar type, and nitrogenous bases.
Identify that DNA is typically double-stranded, while RNA is usually single-stranded.
Recognize that DNA contains deoxyribose sugar, whereas RNA contains ribose sugar.
Understand that DNA uses thymine (T) as one of its nitrogenous bases, while RNA uses uracil (U) instead of thymine.
Combine these points to determine which statement correctly describes RNA's characteristics compared to DNA.
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