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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Hi, I need help with #6 and #7 please and thank you
Transcribed Image Text:Q4.6. What does it mean to say that extension by DNA polymerase III proceeds 5'-3'?
O The 5' end of a DNA polymerase molecule attaches to the 3' end of primase.
O DNA polymerase adds nucleotides to a growing strand, moving in the 5'-3' direction.
O DNA polymerase seals nicks as it moves along a DNA strand toward the 3' end.
O DNA polymerase can only synthesize DNA at the 5' end of an existing strand of DNA.
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Q4.7. In DNA replication, what is the difference between the leading and lagging strands?
In the leading strand, DNA is synthesized 5'→3', while in the lagging strand it is synthesized 3'-5'.
The leading strand is composed of DNA only, while the lagging strand is composed of both RNA and
DNA.
After extension,the leading strand is continuous, while the lagging strand is composed of
disconnected fragments.
The leading strand is synthesized only by DNA polymerase Ill, while the lagging strand is
synthesized only by DNA polymerase l.
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