Question

The molar content of bases in a certain double-stranded virus is analyzed. Which of the following must be true?

1. The % adenine must equal the % uracil
2. The % pyrimidines must equal the % purines
3. The % cytosine must equal the % guanine
4. More than one but not all of the above
5. All of the above (A, B and C)

Answer 1

AnsE) All of the above(A,BandC)

Explaination:

Virus genetic material is double stranded so %of purine(A+G) is equal to %of pyrimidine(TorU+C)

%of cytosine is equal to % of guanine

The % adenine must equal the % uracil. Here which type of nucleic acid in virus is not mention so if genome of virus is ds RNA than adenine pair with uracil and their percentage is similar. Or if ds DNA than adenine % equal to thymine%

As here not mention which nucleic acid so this statement is also correct.