BSC 1010 Study Guide - Final Guide: Okazaki Fragments, Helicase, Dna Replication

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Published on 15 May 2017
School
FIU
Department
Biological Science
Course
BSC 1010
Professor
The most common form of regulation in bacteria and eukaryotes
is transcriptional control.
homeostasis
The maintenance of a constant environment in a cell
An increased vulnerability to cancer
is a likely risk in a clinical trial for a new drug that can activate telomerase.
5' ATGGTCAGT 3
5' ACTGACCAT 3' is complementary to
Endonucleases and exonucleases are
enzymes that can remove nucleotides. An endonuclease cuts DNA internally while an exonuclease
chews away at the end of DNA
DNA helicase
is responsible for unwinding the double helix of DNA.
Fourteen percent of the DNA nucleotides from a certain organism contain T.
You would expect 14 % A, 36 % C, 36 % G of the other bases to be present in this particular DNA.
Replication always proceeds by
adding new bases to 3' end.
The lagging strand
is replicated with stretches of Okazaki fragments and that is why its synthesis is considered to be
discontinuous.
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Chargaff's rules for the pairing of nitrogen bases
A pairs with T and G pairs with C
Semiconservative method
The method of DNA replication where each original strand is used as a template to build a new strand.
Watson and Crick developed a model of DNA
In which the two strands twist into the shape of double helix.
Both sons and daughters will inherit all their mitochondria DNA
from their mother and none from their father.
If an XY individual had a deletion of the SRY gene
they would develop as a female.
In humans, if a non-disjunction event led to an individual with a genotype of XXY
they WOULD be male because they have a Y chromosome.
A normal human female contains
one Barr bodies in her cells.
Huntington's disease is a human hereditary disease that is caused BY
a dominant allele but does not show up in affected individuals until they are in middle age.
A human female with only one X chromosome
is said to have a condition called Turner syndrome.
When nondisjunction occurs
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Document Summary

The most common form of regulation in bacteria and eukaryotes is transcriptional control. homeostasis. The maintenance of a constant environment in a cell. An increased vulnerability to cancer is a likely risk in a clinical trial for a new drug that can activate telomerase. Endonucleases and exonucleases are enzymes that can remove nucleotides. An endonuclease cuts dna internally while an exonuclease chews away at the end of dna. Dna helicase is responsible for unwinding the double helix of dna. Fourteen percent of the dna nucleotides from a certain organism contain t. You would expect 14 % a, 36 % c, 36 % g of the other bases to be present in this particular dna. Replication always proceeds by adding new bases to 3" end. The lagging strand is replicated with stretches of okazaki fragments and that is why its synthesis is considered to be discontinuous. Chargaff"s rules for the pairing of nitrogen bases.

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