Question

select all the true statements about the diagram below. it is dna the red dotted lines represent hydrogen bonds it is a nucleic acid monomer the red dotted lines represent covalent bonds it is rna it is a nucleic acid polymer

Explanation:

1. It is DNA: The diagram shows the base thymine (T), which is unique to DNA (RNA has uracil instead), and the structure has the deoxyribose sugar (implied by the DNA - typical backbone and base pairing), so this is true.
2. The red dotted lines represent hydrogen bonds: In DNA, the base pairs (A - T, G - C) are held together by hydrogen bonds, and the dotted lines between the bases match this, so this is true.
3. It is a nucleic acid monomer: A monomer of a nucleic acid is a nucleotide. The diagram shows a polymer (multiple nucleotides linked by phosphodiester bonds), so this is false.
4. The red dotted lines represent covalent bonds: Covalent bonds are strong, intramolecular bonds (like phosphodiester bonds in the backbone), while the bonds between bases are hydrogen bonds (dotted lines), so this is false.
5. It is RNA: RNA does not have thymine (T) and has ribose sugar. The diagram has T, so it is not RNA, this is false.
6. It is a nucleic acid polymer: The diagram shows multiple nucleotides linked by phosphodiester linkages (as indicated in the diagram), so it is a polymer (DNA is a nucleic acid polymer), this is true.

Answer:

• It is DNA
• The red dotted lines represent hydrogen bonds
• It is a nucleic acid polymer