Question

A model of DNA is shown. Identify the components of the molecule.

Move ONE correct answer to each box. Not all answers will be used.

Cytosine

Deoxyribose

Guanine

Hydrogen bond

Ribose

Uracil

Thymine

Answer 1

I can help — but I don’t see the diagram. Could you either upload the image or tell me which numbered box points to which part (for example: box 1 points to the small pentagon, box 2 to the dotted lines between rungs, box 3 to a two‑ring base, etc.)?

Meanwhile, general rules you can use to place the choices:

- Sugar in DNA = Deoxyribose (place "Deoxyribose" on the pentose sugar in the backbone).
- The links between the two bases (dotted lines) = Hydrogen bond (place "Hydrogen bond" on the dashed lines joining complementary bases).
- Base identification:
- Purines (two fused rings) = Adenine or Guanine. From your answer list only Guanine fits a purine.
- Pyrimidines (single ring) = Cytosine or Thymine. From your list use Cytosine or Thymine as shown.
- C–G pairs have three hydrogen bonds (so if the pictured pair has three dashed lines, label the two bases "Cytosine" and "Guanine").
- A–T pairs have two hydrogen bonds (so if the pictured pair has two dashed lines, label the pyrimidine there "Thymine" — Adenine is not on your list).

Do not use Ribose or Uracil — those are found in RNA, not DNA.

If you upload the model image or describe which box points to which feature, I’ll give the exact labels to place.