Homework SourseWhich of the following statements about DNA and RNA are true
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. |
Solution
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
