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DNA, RNA, and Protein Synthesi
Chappter 10
34
Biology
10th Grade
02/03/2008

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Term
Virulent
Definition
strain of bacterium
Term
transformation
Definition
transfer of genetic material from one cell to another cell or from one organism to another.
Term
bacteriophages
Definition
viruses that infect bacteria
Term

nucleotide 

Definition
two long chains of repeating subunits
Term
deoxyribose
Definition
the 5 carbon sugar in a DNA nucleotide
Term
nitrogenous base
Definition
contains nitrogen and carbon atoms and is a base
Term
pyrimidines
Definition
nitrogenous bases that have a single ring of carbon and nitrogen atoms ( C&T)
Term
purines
Definition
nitrogenous bases that have a double ring of carbon and nitrogen atoms ( A&G).
Term
DNA replication
Definition
process by which DNA is copied in a cell before it divides by mitosis, meiosis, or binary fission.
Term
helicases
Definition
enzymes that move along the DNA molecule and break the hydrogen bonds between the complementary nitrogenous bases.
Term
replication fork
Definition
y-shaped region that results when the 2 strands separate .
Term
DNA polymerases
Definition
add complementary nucleotides that are floating reely inside the nucleus.
Term
semi-conservative replication
Definition
in each new DNA double helix, one strand is from the original molecule, and one strand is new.
Term
mutation
Definition
a change in the nucleotide sequence of a DNA molecule
Term
ribose
Definition
sugar contained in RNA.
Term
messenger RNA
Definition
single stranded RNA molecule that carries the instructions from a gene to make a protein.
Term
ribosomal RNA
Definition
part of the structure of ribosomes.
Term
transfer RNA
Definition
transfers the amino acids to the ribsomes to make a protein.
Term
RNA polymerase
Definition
an enzyme that catalyzes the formation of RNA on a DNA template and binds to the promoter
Term
promoter
Definition
specific nucleotide sequence of DNA where RNA polymerase binds and initates transcription.
Term
termination signal
Definition
a specific sequence of nucleotides that marks the end of a gene.
Term
genetic code
Definition
 the rules that relate how a sequence of nitrogenous bases in nucletides corresponds to a particular amino acid
Term
codon
Definition
each three-nucletide sequence in mRNA that encodes an amino acid or signifies a start or stop
Term
anticodon
Definition
three nucleotides on the RNA that are complementary to the sequence of a codon in mRNA
Term
genome
Definition
the complete genetic content
Term
Experiment that showed that hereditary material can pass from one bacterial cell to another (transformation)- Who discovered this?
Definition
Griffith.
Term
Who's work showed that DNA is the hereditary material that transfers information between bacterial cells.
Definition
Avery
Term
Who confirmed that DNA and not protein, is the hereditary material.
Definition
Hershey and Chase
Term
Who discovered a model of DNA by using Franklin's and Wilkin's DNA diiffraction X-rays.
Definition
Watson & Crick
Term
What is the structure of DNA?
Definition
It is made of 2 nucletide strands that wrap around each other in the shape of a double helix.
Term
What kind of sugar is a DNA nucleotide made up of?
Definition
Deoxyribose
Term
What are the complemetary base pairs?
Definition
G-C, A-T.
Term
The Flow of genetic information:
Definition
DNA-RNA-Protein
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