Replication Bubbles When all of the bubbles have collided, two new strands of DNA have been made. Having multiple replication bubbles, and therefore multiple sites of replication, increases the speed that DNA is copied. Instead of taking a month to replicate DNA, it takes only a couple of hours. Origin of Replication Replication Forks Replication Bubble 2 Replicated Strands of DNA 13. Multiple sites of replication allow cells to duplicate their DNA Topoisomerase and Helicase DNA replication is carried out by a series of enzymes all working together. Topoisomerase, one of these enzymes, is involved in unwinding the DNA strand. As replication occurs, the DNA strand becomes overly twisted and can snap. Topoisomerase cuts the strand of DNA, allowing it to untwist. Then it reattaches the DNA strands together where it was cut. Helicase, another enzyme, breaks the hydrogen bonds that hold bases together, allowing other enzymes to add complementary nucleotides. Single-Strand Binding Proteins (SSB's) keep the strands separated. Topoisomerase 14. unwinds DNA. Helicase 15. Helicase separates the nitrogenous bases by breaking the bonds. 16. SSB Proteins keep the two strands SSB Proteins
Replication Bubbles When all of the bubbles have collided, two new strands of DNA have been made. Having multiple replication bubbles, and therefore multiple sites of replication, increases the speed that DNA is copied. Instead of taking a month to replicate DNA, it takes only a couple of hours. Origin of Replication Replication Forks Replication Bubble 2 Replicated Strands of DNA 13. Multiple sites of replication allow cells to duplicate their DNA Topoisomerase and Helicase DNA replication is carried out by a series of enzymes all working together. Topoisomerase, one of these enzymes, is involved in unwinding the DNA strand. As replication occurs, the DNA strand becomes overly twisted and can snap. Topoisomerase cuts the strand of DNA, allowing it to untwist. Then it reattaches the DNA strands together where it was cut. Helicase, another enzyme, breaks the hydrogen bonds that hold bases together, allowing other enzymes to add complementary nucleotides. Single-Strand Binding Proteins (SSB's) keep the strands separated. Topoisomerase 14. unwinds DNA. Helicase 15. Helicase separates the nitrogenous bases by breaking the bonds. 16. SSB Proteins keep the two strands SSB Proteins
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Replication Bubbles
When all of the bubbles have collided, two new strands of DNA have been made. Having multiple
replication bubbles, and therefore multiple sites of replication, increases the speed that DNA is
copied. Instead of taking a month to replicate DNA, it takes only a couple of hours.
Origin of
Replication
Replication
Forks
Replication
Bubble
2 Replicated
Strands of DNA
13. Multiple sites of replication allow cells to duplicate their DNA
Topoisomerase and Helicase
DNA replication is carried out by a series of enzymes all working together. Topoisomerase, one of
these enzymes, is involved in unwinding the DNA strand. As replication occurs, the DNA strand
becomes overly twisted and can snap. Topoisomerase cuts the strand of DNA, allowing it to untwist.
Then it reattaches the DNA strands together where it was cut. Helicase, another enzyme, breaks the
hydrogen bonds that hold bases together, allowing other enzymes to add complementary
nucleotides. Single-Strand Binding Proteins (SSB's) keep the strands separated.
Topoisomerase
14.
unwinds DNA.
Helicase
15. Helicase separates the nitrogenous bases
by breaking the
bonds.
16. SSB Proteins keep the two strands
SSB Proteins
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