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CH 14-15 Intro To Biology
DNA and Genes, RNA. mRNA, tRNA etc
25
Biology
Undergraduate 2
11/23/2015

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Cards

Term
What is the genetic material?
Definition
DNA
Term
What are the monomers that make up DNA?
Definition
Nucleotides
Term
Describe the structure of a nucleotide?
Definition
5-carbon sugar, phosphate group, and nitrogenous base
Term
List the nitrogenous bases and their pairs, and whether they are purines or pyrimidines, double or single ringed and which are double bonded or triple bonded?
Definition

A-T purines, double ringed, double bonded

C-G pyrimidines, single ringed, triple bonded

Term
Chargraff's Rule
Definition

A base pair rule of 1:1

ex] equal amounts of a to t

equal amounts of g to c

Term
Is DNA double helix or single stranded?
Definition
Double Helix
Term
What is meant by antiparallel?
Definition

Side by side but running in opposite directions

---->

<----

Term
What is meant by semiconservative?
Definition
DNA separates and free nucleotides pair with exposed bases to make 2 new strands
Term
What is meant by 5' and 3'?
Definition
Indicates carbon # in sugar/ gives direction. Always runs 5'-3'
Term
What kind of bond attracts the phosphate and sugar backbone?
Definition
Phosphodiester bond
Term
What kind of bonds form between the nitrogenous bases?
Definition
Hydrogen Bonds
Term
Describe DNA replication by the enzyme order?
Definition

Helicase

DNA Gyrase

DNA Primase

DNA Ligase

DNA Gyrase

Term
Role of Helicase enzyme
Definition
Separates DNA strands
Term
DNA Gyrase 1
Definition
Relieves torsion strain
Term
DNA Primase
Definition

Creates RNA polyamerase/ DNA Primer

 

Term
DNA Ligase
Definition
Facilitates joining of DNA strands in direction
Term
DNA Gyrase 2
Definition
unlinks the 2 molecules
Term
What direction is DNA synthesized?
Definition
5'-3'
Term
Discuss 2 differences between prokaryotic DNA replication and Eukaryotic DNA replication.
Definition

P-one point of origin, 2 directions same time

E-More DNA, multiple linear chromosomes

Term
What are telomeres? Discuss relation among telomeres and cancer and aging?
Definition
Structures at the ends of chromosomes protect genetic data. telomerase is common in cancer cells, thats how the infinitely replicate
Term
What is the start codon?
Definition
AUG
Term
What are the 3 stop codons?
Definition

UAA

AUG

UGA

Term
What is the purpose of the 5' cap and the 3' poly-A tail being added to the transcript mRNA?
Definition
for protection
Term
Introns vs Exons
Definition
Introns are spliced out and exons are expressed
Term

What is the charging reaction of tRNA?

 

Definition
joining of an amino acid and tRNA
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