Question

Which of the following statements about DNA is (are) true?

DNA contains thymine but not uracil

DNA molecules contain deoxyribose

Adenine on one strand will be connected to thymine on the complimentary strand

Within cells, DNA molecules are usually double-stranded

All of the statements are true

Answer 1

Ans) All of the statements are true

Explaination:

DNA contain thymine but not uracil which is present in RNA.

DNA molecule consist of deoxyribose sugar.

Adenine on one strand of DNA will be connected to Thymine on the complimentary strand of DNA through double hydrogen bonds.

DNA molecules are usually double stranded because in most of organisms DNA is double stranded but in few viruses DNA is single stranded

So all of the statements given in question regarding DNA are true .