1. An enzyme that recognizes and cuts DNA only at a particular sequence of nucleotides is often called :   Restriction endonuclease   RNA polymerase   Photolyase   DNA glycosylase   Hint Half-n-half Clue   2. A major difference between DNA replication in prokaryotes and eukaryotes is :   there is only one replication origin in prokaryotes.   replication is conservative in prokaryotes   DNA amylase performs the function of DNA helicase in prokaryotes   prokaryotes do not use Topoisomerase in the replication process   Half-n-half Clue   3. What does transformation involve in Bacteria ?   the creation of a strand of RNA from DNA   assimilation of external DNA into a cell   the creation of a strand of DNA from RNA   the infection of cells by a phage DNA molecule   Half-n-half Clue   4. The enzyme responsible for initiating the unwinding of double-stranded DNA (eliminating supercoiling) by nicking a single strand of the DNA molecule is :   Gyrase   Topoisomerase   Ligase   Helicase   Half-n-half Clue   5. The enzyme X removes RNA primers attached by Primase and this gap is then filled in by DNA Polymerase I. The enzyme X is :   RNase H   DNA amylase   DNA ligase   Reverse Transcriptase   Half-n-half Clue   6. A repeating DNA sequence at the end of chromosomes that prevents them from losing base pair sequences at their ends and from fusing together is called :   A Telomere   A Telomerase   A replicon   None of the above.   Half-n-half Clue   7. The enzyme (made of proteins and RNA) that elongates chromosomes by adding TTAGGG sequences to the end of existing chromosomes is :   Telomerase   Exonuclease   Endonuclease   Amylase   Half-n-half Clue