1- Assume if you isolate a single nucleotide from a nucleic acid chain and determine that the nitrogenous ring structure is cytosine, you could say with certainty that the nucleotide could have come from:
- DNA but not RNA.
- RNA but not DNA.
- either DNA or RNA.
- neither DNA nor RNA.
- double-stranded DNA but not single-stranded DNA.
2- Which one of the following biological polymers is defined by a physical property rather than a chemical structure?
- proteins
- lipids
- monosaccharides
- nucleic acids
- polysaccharides