Which of the following statements about DNA and RNA are true, and which are fals
ID: 309163 • Letter: W
Question
Which of the following statements about DNA and RNA are true, and which are false?
DNA is usually a double-stranded molecule, and RNA is usually single-stranded.
The nitrogenous base thymine is present in DNA and RNA, while uracil is present only in RNA.
A hydrogen atom is present on the 3? carbon in the ribose of DNA nucleotides, whereas a hydroxyl group is present at the same position on RNA nucleotides.
The DNA and RNA molecules in a cell are copied by replication before a cell divides.
RNA is the primary long-term storage molecule for genetic information in eukaryotic cells.
DNA is usually a double-stranded molecule, and RNA is usually single-stranded.
The nitrogenous base thymine is present in DNA and RNA, while uracil is present only in RNA.
A hydrogen atom is present on the 3? carbon in the ribose of DNA nucleotides, whereas a hydroxyl group is present at the same position on RNA nucleotides.
The DNA and RNA molecules in a cell are copied by replication before a cell divides.
RNA is the primary long-term storage molecule for genetic information in eukaryotic cells.
Explanation / Answer
DNA is usually a double-stranded molecule, and RNA is usually single-stranded - True.
The nitrogenous base thymine is present in DNA and RNA, while uracil is present only in RNA - False
A hydrogen atom is present on the 3? carbon in the ribose of DNA nucleotides, whereas a hydroxyl group is present at the same position on RNA nucleotides - False
The DNA and RNA molecules in a cell are copied by replication before a cell divides - False
RNA is the primary long-term storage molecule for genetic information in eukaryotic cells - False
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