Nr 503 Midterm Update Midterm Exam Questions With Correct Verified Answers | 100% Pass (A+ Certified)

NR 503 MIDTERM UPDATE MIDTERM EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED) 1. What is the leading strand Correct Answer 5' - 3' continuous strand 2. what is the lagging strand Correct Answer 3 to 5' strand made in discontinous manner 3. what is the role of the dna polymerase Correct Answer 3' to 5' exonuclease activity that allows it to proof read 4. what are histones Correct Answer proteins that DNA wraps around 5. what do histones form Correct Answer chromatin 6. how are new nucleosomes made Correct Answer via replication fork and recombination of new and old histones 7. what are telomeres Correct Answer DNA at the tips of chromosomes 8. what happens to the length of telomeres after rounds of replication Correct Answer they shorten 9. explain the structure of telomeres Correct Answer TTAGGG repeat with the 3' end overhanging the 5' end 10. what is a telomerase Correct Answer A reverse transcriptase that includes the complementary sequence to the TTAGGG repeats and serves as a template for adding to the 3' overhang 11. what makes up a telomerase Correct Answer rna and protein 12. explain the 3' overhang in telomeres in terms of protection Correct Answer the 3' end of telomeres is bound by specific proteins that protect the ends from exonuclease attack 13. explain the steps of chromosome shortening during dna replication Correct Answer helicase unwinds the DNA strands leading strand is synthesized via dna pol lagging strand Correct Answer primase makes primer, allows dna pol to attach and fill gaps between okazaki fragments, ligase seals and the primer is then degraded leaving a gap 14. what are single stranded binding proteins Correct Answer