1. The DNA molecules of different species differ in their :   phosphate backbone   sequence of bases   type of nucleotides   All of the above   Hint Half-n-half Clue   2. In the DNA Double Helix, complementary base pairs are held together by :   hydrogen bonds   peptide bonds   ionic bonds   N-glycosidic bonds   Half-n-half Clue   3. A nucleoside consists of :   a hexose sugar and a nitrogeneous heterocyclic base.   a pentose sugar and a nitrogeneous heterocyclic base.   a pentose sugar and a oxygen base.   a phosphate group, a pentose sugar and a nitrogeneous heterocyclic base.   Half-n-half Clue   4. The difference between DNA and RNA is :   The RNA sugar phosphate backbone contains ribose rather than deoxyribose.   DNA molecules are double stranded while RNA molecules are single stranded for the most part.   Thymine in DNA is replaced by Uracil in RNA.   All of the above.   Half-n-half Clue   5. Which base is found in RNA but not DNA ?   Uracil   Thymine   Adenine   Cytosine   Half-n-half Clue   6. A significant difference between prokaryotes and eukaryotes is :   Prokaryotes do not have DNA as their genetic material while eukaryotes do.   The DNA of prokaryotes floats freely around the cell while the DNA of eukaryotes is held within its nucleus.   Prokaryotes do not have ribosomes while eukaryotes do.   Prokaryote cells are not membrane-bound while eukaryote cells are.   Half-n-half Clue   7. Because one original strand of the double stranded DNA helix is found in each daughter cell (after cell division), the DNA replication process is :   dispersive   derivative   semiconservative   conservative   Half-n-half Clue