SBI4U - DNA: The Molecular Basis of Life (ISU)

Card Set Information

Author:
Oddishii
ID:
284135
Filename:
SBI4U - DNA: The Molecular Basis of Life (ISU)
Updated:
2014-09-26 02:41:42
Tags:
isu dna sbi4u bellissimo grade 12 biology poop
Folders:

Description:
moist
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user Oddishii on FreezingBlue Flashcards. What would you like to do?


  1. Anneal
    The pairing of complementary strands of DNA through hydrogen bonding
  2. What are the two comeplementary base pairing in DNA?
    • Adenine-thymine
    • Guanine-cytosine
  3. Deoxyribonucleoside triphosphates
    Molecules composed of a deoxyribose bonded to three phosphate groups and a nitrogenous base
  4. In deoxyribose sugar, which carbon is the hydroxyl group missing?
    2
  5. DNA gyrase
    Enzyme that relieves tension when unwinding DNA
  6. Enzyme that relieves tension when unwinding DNA
    DNA gyrase
  7. DNA helicase
    Enzyme that unwinds double helix by disrupting H-bonds
  8. Enzyme that unwinds double helix by disrupting H-bonds
    DNA helicase
  9. DNA ligase
    Enzyme that joins DNA fragments together by catalyzing the formation of a bond between the 3' hydroxyl group and the 5' phosphate group on the sugar backbones
  10. Enzyme that joins DNA fragments together by catalyzing the formation of a bond between the 3' hydroxyl group and the 5' phosphate group on the sugar backbones
    DNA ligase
  11. DNA polymerase I
    Enzyme that removes RNA primers and replaces hem with appropriate nucleotides
  12. Enzyme that removes RNA primers and replaces hem with appropriate nucleotides
    DNA polymerase I
  13. DNA polymerase III
    Enzyme responsible for synthesizing complementary strands of DNA
  14. Enzyme responsible for synthesizing complementary strands of DNA
    DNA polymerase III
  15. Exonuclease
    Enzyme that cuts out nucleotides at the end of a DNA strand
  16. Enzyme that cuts out nucleotides at the end of a DNA strand
    Exonuclease
  17. Glycosyl bond
    Bonding sugar and another organic molecule by intervening nitrogen or oxygen
  18. Lagging strand
    DNA strand synthesized in short fragments
  19. DNA strand synthesized in short fragments
    Lagging strang
  20. Leading strand
    DNA strand synthesized continuously
  21. DNA strand synthesized continuously
    Leading strand
  22. Nucleotides
    • 5 carbon sugar
    • Phosphate group
    • Nitrogeneous bases
  23. Okazaki fragments
    Short fragments of DNA in lagging strand
  24. Phosphodiester bond
    Bond that holds nucleotides of DNA together
  25. Bond that holds nucleotides of DNA together
    Phosphodiester
  26. Primase
    Enzyme that builds RNA primers
  27. Enzyme that builds RNA primers
    Primase
  28. Replication bubble
    2 forks are close to each other - bubble
  29. replication fork
    enzymes replacing a dna molecule are bound tosingle dna
  30. RNA Primer
    because DNA cant replicate on its own, these guys are annealed to a region of single stranded DA to initiate DNA replication THANKS BUDS
  31. semiconservative
    dna is composed of one parent strand and one newly synthesized strand
  32. what do single sranded binding proteins do
    keeps separated strands apart (:<
  33. In DNA, which carbon does phosphate reside?
    5
  34. In DNA, which carbon does the hydroxyl group of the deoxyribose sugar reside?
    3
  35. Nitrogenous bases are atached to deoxyribose sugar using?
    Glycosyl bonds
  36. The sugar phosphate backboneis held together by what bond?
    Phosphodiester
  37. The leading strand is built continuously towards or away from the replication fork?
    towars B-)
  38. The double helix makes a complete turn every __ nm along its length
    3.4 nm
  39. Complementary bases are connected to each other using?
    Hydrogen bonds
  40. What direction does DNA polymerase ___ build a complementary strand
    III; 5 to 3
  41. Name what each enzyme does:

    DNA gyrase
    DNA helicase
    DNA ligase
    DNA polymerase I
    DNA polymerase III
    Exonuclease
    Primase
    • Relieves tension when unwinding
    • Unwinds double helix
    • Links lagging strand together to produce a phosphodiester bond
    • Removes RNA primers and replaces them with appropriate nucleotides
    • Synthesizes complete complementary strands
    • Cuts nucleotides at end of DNA strad
    • Glues RNA strands to begi replication
  42. Diameter of DNA
    2 nm
  43. Distance between pairs of complementary bases
    0.34 nm
  44. Full helix structure size
    3.4 nm
  45. Which nitrogenous bases are double ringed
    Adenine and Guanine
  46. Which nitrogenous pases are single ringed pyramiafkjsdlhfkaj
    Cytosine and Thymine
  47. How find out about semi conserative?
    intermediate band ever dispapeared therefore parent dna always there therefore individual strands remian intact during replication as templates
  48. Describe the process of replication
    • DNA helicase unwinds double helix  by breaking H bonds, which are kept apart by single stranded binding proteins to block H bonds from annealing
    • DNA gyrase relieves the tension when unwinding by cuttin git
    • Replication begins in two directions of the origin

    • to make complementary strands:
    • DNA polymerase III is used
    • first it synthesizes DNA is 5 to 3 adding deoxyribosenucleoside triphosphates
    • RNA primers added to template strand, synthesized with primase therefore start growing a complimentary strad
    • gets energy from breakijng the bond between 1 and  phosphate
    • leading strand is synthesized 5 to 3 direction as a template continuously and isbuilt towards replication fork
    • other strand discomtinued laggign starnd into okazaki strands
    • DNA polyermase I removes RNA primers
    • DNA ligase joins Okasaki 
    • after two strands made, twisted

What would you like to do?

Home > Flashcards > Print Preview