Study Module 16- BIO

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Freshman in College BIO 120 Flashcards on Study Module 16- BIO, created by paulinemansour on 11/22/2014.

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Question Answer
In bacterial DNA replication of the lagging strand, __________ is required for the synthesis of a new DNA strand whereas __________ is required for removing the RNA primer and replacing it with DNA nucleotides. DNA pol III; DNA pol I
Replication of the lagging strand of DNA is accomplished by repeatedly making __________ followed by 1,000–2,000 nucleotide segments called __________. short RNA primers; Okazaki fragments
DNA polymerase adds nucleotides to the __________ of the leading strands, and to the __________ of the lagging strands (Okazaki fragments). 3'; 3'
Of the three alternative models of DNA replication, which are the __________ models, the one that explains how DNA replicates is the __________ model. conservative, semiconservative, and dispersive; semiconservative
When __________ form after an exposure to ultraviolet (UV) light, a __________ can remove the damaged nucleotides and replace them with normal nucleotides. thymine dimmers; nucleotide excision repair enzyme
In DNA replication, the next nucleotide is incorporated into the growing polymer at the __________ of the molecule by an enzyme called __________. 3' (hydroxyl) end; DNA polymerase
What is the 3' end and what is the 5' end. 3' is hydroxyl, 5' is phosphate
In DNA, the two purines are __________, and the two pyrimidines are __________. adenine and guanine; cytosine and thymine
What describes DNA replication? Helicases seperate the 2 strands of double helix, then those strands are copied by the 2 original strands that are used as templates.
The role of DNA polymerases in DNA replication is to __________. attach free nucleotides to the new DNA strand
Telomeres are __________. repeating noncoding sequences at the end of linear eukaryotic chromosomes
NA replication begins at a site called the origin of replication, forming a bubble, which is followed by a __________, where parental strands are unwound by __________. replication fork; helicases
A virus that infects bacteria is called a __________, which is made up of the macromolecules __________ and __________. bacteriophage; DNA; protein
The information in DNA is contained in __________. the sequence of nucleotides along the length of the two strands of the DNA molecule
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