Answers to choose from: double stranded break repair base excision repair nucleotide excision repair mismatch repair light dependent DNA repair
Answers to choose from: double stranded break repair base excision repair nucleotide excision repair mismatch repair light dependent DNA repair
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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Answers to choose from:
double stranded break repair
base excision repair
mismatch repair
light dependent DNA repair
![Match the descriptions to the type of DNA Repair.
A methylated cytosine is deaminated. This forms
thymine, a normal base, except that it is across
from guanine (the correct partner for cytosine). A
protein recognizes the mis-pairing and recruits
repair enzymes to cut out that section of the DNA
strand and replace the strand via complementary
base pairing.
During replication, DNA pol III mistakenly adds an
adenine across from a guanine. The proof-reading
subunit of the polymerase recognizes the error, the
polymerase backs up, uses its 3' to 5' exonuclease
activity to cut out the last few bases that it laid
down. Then it goes forward again making the new
strand using the template.
Glycosylase enzymes scan DNA for damages to
individual nitrogenous bases in the DNA. If they
find damaged bases, they cut that individual
nitrogenous base out of the dsDNA, which is then
replace by DNA Pol I.
The covalent bonds forming the thymine-dimer are
cleaved so that the DNA strand is normal again. No
bases are removed or replaced.
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Transcribed Image Text:Match the descriptions to the type of DNA Repair.
A methylated cytosine is deaminated. This forms
thymine, a normal base, except that it is across
from guanine (the correct partner for cytosine). A
protein recognizes the mis-pairing and recruits
repair enzymes to cut out that section of the DNA
strand and replace the strand via complementary
base pairing.
During replication, DNA pol III mistakenly adds an
adenine across from a guanine. The proof-reading
subunit of the polymerase recognizes the error, the
polymerase backs up, uses its 3' to 5' exonuclease
activity to cut out the last few bases that it laid
down. Then it goes forward again making the new
strand using the template.
Glycosylase enzymes scan DNA for damages to
individual nitrogenous bases in the DNA. If they
find damaged bases, they cut that individual
nitrogenous base out of the dsDNA, which is then
replace by DNA Pol I.
The covalent bonds forming the thymine-dimer are
cleaved so that the DNA strand is normal again. No
bases are removed or replaced.
Choose]
[Choose ]
[Choose]
[Choose ]
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