Some viruses have single-stranded DNA as their genetic material. This DNA molecule has to be folded to fit in the protein coat.
Which statements about single-stranded DNA are correct?
1) Single-stranded DNA cannot replicate semi-conservatively.
2) If only the percentage of cytosine is known, then the percentage of guanine can be calculated, but the percentage of adenine and thymine cannot be calculated.
3) Hydrogen bonds may be present within the DNA molecule.
1 )
1, 2 and 3
2 )
1 and 2 only
1 and 3 only
4 )
2 and 3 only
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