BIO 152 EXAM 2 WITH CORRECT
ANSWERS 2025
monomer of DNA correct answers >> deoxyribonucleotide
monomer of RNA correct answers >> ribonucleotides
3 core components of a nucleotide correct answers >> 5-
carbon sugar, base group containing nitrogen, and one or more
phosphate groups
pyrimidine bases correct answers >> cytosine, thymine, and
uracil (single ring)
purine bases correct answers >> adenine and guanine
(double ring)
adjacent pairs of nucleotides are joined together by correct
answers >> phosphodiester bonds
in DNA's secondary structure, adenine hydrogen bonds with
___________, and __________ hydrogen bonds with cytosine.
correct answers >> thymine; guanine
4 forces that stabilize DNA correct answers >> hydrogen
bonds, hydrophobic interactions with between nonpolar bases,
hydrophillic interactions between sugar phosphate backbone, and
Base Stacking/ Van de Waal's interactions
, DNA Polymerase I correct answers >> replaces RNA primers
with DNA
DNA Polymerase III correct answers >> attached nucleotides
to the new DNA but needs 3' end to start, also has proofreading
ability
Single-stranded binding proteins (SSBP) correct answers >>
binds to a single-stranded DNA to stabilize them, which allows for
replication to occur
Ligase correct answers >> fills in gaps made by DNA
polymerase I and connects okasaki fragments
RNA primase correct answers >> adds RNA primers
Helicase correct answers >> seperated the DNA by breaking
hydrogen bonds
topoisomerase II correct answers >> releases the tension by
cutting the DNA and putting it back together
DNA replication: "Open" DNA at origin of replication by ___________
correct answers >> helicase
DNA replication: Topoisomerase II releases ___________from
unwinding correct answers >> tension
ANSWERS 2025
monomer of DNA correct answers >> deoxyribonucleotide
monomer of RNA correct answers >> ribonucleotides
3 core components of a nucleotide correct answers >> 5-
carbon sugar, base group containing nitrogen, and one or more
phosphate groups
pyrimidine bases correct answers >> cytosine, thymine, and
uracil (single ring)
purine bases correct answers >> adenine and guanine
(double ring)
adjacent pairs of nucleotides are joined together by correct
answers >> phosphodiester bonds
in DNA's secondary structure, adenine hydrogen bonds with
___________, and __________ hydrogen bonds with cytosine.
correct answers >> thymine; guanine
4 forces that stabilize DNA correct answers >> hydrogen
bonds, hydrophobic interactions with between nonpolar bases,
hydrophillic interactions between sugar phosphate backbone, and
Base Stacking/ Van de Waal's interactions
, DNA Polymerase I correct answers >> replaces RNA primers
with DNA
DNA Polymerase III correct answers >> attached nucleotides
to the new DNA but needs 3' end to start, also has proofreading
ability
Single-stranded binding proteins (SSBP) correct answers >>
binds to a single-stranded DNA to stabilize them, which allows for
replication to occur
Ligase correct answers >> fills in gaps made by DNA
polymerase I and connects okasaki fragments
RNA primase correct answers >> adds RNA primers
Helicase correct answers >> seperated the DNA by breaking
hydrogen bonds
topoisomerase II correct answers >> releases the tension by
cutting the DNA and putting it back together
DNA replication: "Open" DNA at origin of replication by ___________
correct answers >> helicase
DNA replication: Topoisomerase II releases ___________from
unwinding correct answers >> tension
