Which of the following is NOT a pyrimidine base? cytosine uracil adenosine O thymine QUESTION 2 A strand of DNA or RNA: O contains 5-2 phosphodiester bonds. O might be an oligonucleotide. O has a C-terminus and an N-terminus. O has no charge QUESTION 3 The process of separating strands of a DNA double helix is known as: O separation O denaturation. O annealing replication 0000 QUESTION 4 Less condensed, gene-rich chromatin (genetically active, coding DNA) is referred to as: O nucleosomes. O histones. O heterochromatin. O euchromatin. QUESTION 5 Which enzyme is used to cleave DNA at specific sequences during the production of recombinant DNA/doning? O DNA methylase O restriction endonucleases reverse transcriptase DNA ligase QUESTION 6 DNA sequence can affect the Tm. If the G-C content increases, why does the Tm go up? O There are two hydrogen bonds between G-C. O There are three strong covalent bonds between G-C. Denaturation is more difficult a and b only Click Save and Submit to saUe and submit, Click Save All Answers to save all ansuers.