Question

question 1 comparing the structure and functions of dna and rna, which of the following statements is most accurate? answer dna always contains the nitrogenous base uracil. the pentose sugar in dna nucleotides is ribose. dna is copied into rna and that copy is used to build specific proteins. rna contains a pair of nucleotide chains. i dont know yet

Explanation:

1. DNA contains thymine, not uracil. Uracil is specific to RNA. So the first option is incorrect.
2. The pentose sugar in DNA nucleotides is deoxy - ribose, not ribose. Ribose is the sugar in RNA nucleotides. So the second option is incorrect.
3. Transcription is the process by which DNA is copied into RNA (mRNA specifically), and then translation uses that mRNA copy to build specific proteins. This is a fundamental process in molecular biology and is correct.
4. RNA is usually single - stranded, while DNA is double - stranded. So the fourth option is incorrect.

Answer:

DNA is copied into RNA and that copy is used to build specific proteins.