1. DNA Polymerase III is actually an aggregate of several different protein subunits. So it is often called a :   Holoenzyme   Primeosome   replisome   None of the above   Hint Half-n-half Clue   2. The enzyme that accomplishes the unwinding of the original double stranded DNA molecule, once supercoiling has been eliminated, by breaking the hydrogen bonds that hold the two strands together is :   DNA Polymerase II   Primase   Helicase   Topoisomerase   Half-n-half Clue   3. A mamalian cell typically has 1.2 meters (when completely outstretched) of double stranded DNA.The total time to duplicate the DNA is 5 hours. How many origins of replication are there if the rate of duplication is 16µmeters/min ?   250   15000   1   500   Half-n-half Clue   4. The end of a DNA strand that has a phosphate group attached to the number 5 carbon of its terminal deoxyribonucleotide is called :   The 5 prime end (5')   The 3 prime end (3')   N-Terminus   C-Terminus   Half-n-half Clue   5. The enzyme that (during replication) proceeds along one of the strands of a DNA molecule adding deoxy-nucleotide-triphosphates to hydrogen bond with their appropriate complementary dNTP on the other single strand and to form a covalent phosphodiester bond with the previous nucleotide of the same strand is called :   Primase   DNA Polymerase I   DNA Polymerase II   DNA Polymerase III   Half-n-half Clue   6. The enzyme that creates a short RNA oligonucleotide at initiation sites where replication is to be carried out is called :   Primase   DNA Ligase   DNA Gyrase   Exonuclease   Half-n-half Clue   7. Which of the following agents is not a mutagen ?   Ultraviolet radiation   A retrovirus   A transposon or jumping gene   None of the above   Half-n-half Clue