Section 10-3 Review: DNA REPLICATION ||
QUESTIONS & ANSWERS RATED 100% CORECT!!
Replication fork correct answers Y-shaped region that results when two parental strands
separate
Helicase correct answers Enzyme that separates the strands of DNA during replication
Semi-conservative replication correct answers In each new DNA double helix, one strand is
from the original molecule, and one strand is new
Before replication can take place, correct answers The two strands of DNA must separate
Replication of the two DNA strands takes place correct answers In two different directions
In replication in prokaryotes, correct answers Two replication forks move in opposite
directions
A mutation is correct answers Change in the nucleotide sequence of DNA
Which of the following enzymes is involved with breaking hydrogen bonds? correct answers
DNA helicase
How does replication occur so quickly in eukaryotes? correct answers Replication begins at
many points or origins along the DNA. At each origin, 2 replication forks move in opposite
directions
Why is it important that exact copies of DNA are produced during replication? correct
answers If an exact copy is not produced, mutations occur
How is DNA replication related to cancer? correct answers Errors in DNA replication cause
mutation. Mutations that affect genes and control how a cell divides can lead to a tumor,
causing cancer
Why is it advantageous to have weak hydrogen bonds between complementary bases and
strong covalent bonds between phosphate and deoxyribose groups in a DNA molecule?
correct answers Helicase can break apart weak hydrogen bonds easier to separate the 2
parental strands. Strong covalent bonds keep each DNA strand intact
Part A correct answers Helicase separates the DNA strands
Part B correct answers DNA polymerases add nucleotides that are complementary to each of
the original DNA strands
Part C correct answers DNA polymerases are released. 2 DNA molecules identical to the
original DNA molecule result
QUESTIONS & ANSWERS RATED 100% CORECT!!
Replication fork correct answers Y-shaped region that results when two parental strands
separate
Helicase correct answers Enzyme that separates the strands of DNA during replication
Semi-conservative replication correct answers In each new DNA double helix, one strand is
from the original molecule, and one strand is new
Before replication can take place, correct answers The two strands of DNA must separate
Replication of the two DNA strands takes place correct answers In two different directions
In replication in prokaryotes, correct answers Two replication forks move in opposite
directions
A mutation is correct answers Change in the nucleotide sequence of DNA
Which of the following enzymes is involved with breaking hydrogen bonds? correct answers
DNA helicase
How does replication occur so quickly in eukaryotes? correct answers Replication begins at
many points or origins along the DNA. At each origin, 2 replication forks move in opposite
directions
Why is it important that exact copies of DNA are produced during replication? correct
answers If an exact copy is not produced, mutations occur
How is DNA replication related to cancer? correct answers Errors in DNA replication cause
mutation. Mutations that affect genes and control how a cell divides can lead to a tumor,
causing cancer
Why is it advantageous to have weak hydrogen bonds between complementary bases and
strong covalent bonds between phosphate and deoxyribose groups in a DNA molecule?
correct answers Helicase can break apart weak hydrogen bonds easier to separate the 2
parental strands. Strong covalent bonds keep each DNA strand intact
Part A correct answers Helicase separates the DNA strands
Part B correct answers DNA polymerases add nucleotides that are complementary to each of
the original DNA strands
Part C correct answers DNA polymerases are released. 2 DNA molecules identical to the
original DNA molecule result
