The structure of nucleic acids, DNA and RNA, differ in that a DNA contains a nucleotide with thymine, while RNA contains a nucleotide with uracil. b RNA contains only three different nucleotides, while DNA contains four different nucleotides. c RNA's backbone is made up of phosphates, while DNA's backbone is made up of nitrates. d DNA's nucleotide sequence is single stranded, while RNA's nucleotide sequence is double stranded.

Answer 1

The statements you provided contain a mix of accurate and inaccurate information regarding the structure of nucleic acids, DNA and RNA. Let's break them down:

a) Correct: DNA contains thymine (T) as one of its four nucleotides, while RNA contains uracil (U) instead of thymine.

b) Incorrect: Both DNA and RNA contain four types of nucleotides; however, the specific nucleotides differ. DNA has adenine (A), thymine (T), cytosine (C), and guanine (G). RNA has adenine (A), uracil (U), cytosine (C), and guanine (G).

c) Incorrect: The backbone of both DNA and RNA is composed of a sugar (deoxyribose in DNA and ribose in RNA) and phosphate groups. There are no "nitrates" in the backbone structure of either nucleic acid.

d) Incorrect: DNA is typically double-stranded, while RNA is usually single-stranded.

In summary, only statement a) is accurate, while the others contain factual inaccuracies.