Question

1. describe the structural differences between dna and rna.

Explanation:

1. Sugar component: DNA contains deoxyribose (lacks an oxygen on the 2' carbon of the sugar ring), while RNA contains ribose (has an oxygen on the 2' carbon).
2. Nitrogenous bases: DNA uses adenine (A), thymine (T), cytosine (C), and guanine (G); RNA replaces thymine with uracil (U).
3. Strand structure: DNA is typically a double-stranded, helical molecule with complementary base pairing; RNA is mostly single-stranded (though some forms can fold into secondary structures).
4. Length: DNA is generally much longer, storing the full genetic code of an organism; RNA molecules are shorter, carrying only segments of genetic information for specific functions.

Answer:

1. Sugar type: DNA has deoxyribose; RNA has ribose.
2. Bases: DNA uses thymine; RNA uses uracil.
3. Structure: DNA is double-stranded helix; RNA is mostly single-stranded.
4. Size: DNA is longer (full genome); RNA is shorter (gene segments).