Question

Which of these associations does not correctly compare DNA and RNA? DNA a. Contains the base thymine. Contains the base uracil. b. Is double-stranded. \(\quad\) Is a single-stranded helix. c. Is found only in the nucleus. Is found in the nucleus and cytoplasm. d. The sugar is deoxyribose. \(\quad\) The sugar is ribose.

Short answer

All given associations correctly compare DNA and RNA: a. DNA contains the base thymine, RNA contains the base uracil. b. DNA is double-stranded, RNA is single-stranded. c. DNA is found only in the nucleus, RNA is found in the nucleus and cytoplasm. d. DNA has deoxyribose sugar, RNA has ribose sugar.

Step-by-step solution

Analyze the given associations:

Let's analyze each association option to check if they are correct: a. DNA contains the base thymine and RNA contains the base uracil. b. DNA is double-stranded and RNA is single-stranded helix. c. DNA is found only in the nucleus and RNA is found in the nucleus and cytoplasm. d. The sugar in DNA is deoxyribose and the sugar in RNA is ribose.

Compare the options with the main differences between DNA and RNA

a. DNA contains the base thymine (T), while RNA contains the base uracil (U) instead of thymine. This association is correct. b. DNA is double-stranded, forming a double helix, while RNA is usually single-stranded, which allows it to fold into different structures. This association is also correct. c. DNA is found only in the nucleus of a cell, whereas RNA can be found both in the nucleus and the cytoplasm. This association is correct as well. d. The sugar in DNA is deoxyribose, and the sugar in RNA is ribose. This difference in structure affects the stability and function of the molecules. This association is correct. According to the analysis, all options correctly compare DNA and RNA.