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What does DNA stand for?
Deoxribose Nucleic acid
Whats is DNAs primary function
acts as guidlines
what are the repeating subunits called that make up DNA
Name three parts of a DNA nucleotide
deoxribose sugar, phosphate, nitrogen base
name the four nitrogen bases of a DNA nucleotide
Thymine, Adiene,Guanime, cytosine
What is the differnce between a purine & prymidine
purine has a double ring, prymidine has a single ring
how does DNA look?
- -double helix
- -two strands
what makes up the "steps" of a DNA molecule
how does the nucleotide sequence in one chain of DNA compare with the other chain of DNA
what is the function of DNA polymerase
joins nucleotides and proof reads
what did roseland franklin do?
used an X-ray to find that DNA is double helixed
what did erwin hargaff figure out about DNA
chargaff rule ( A-T, G-C)
What did Watson and Crick figure out
the stole roseland franklins idea about the double helix and created the first model of DNA
what are the fragments called in the lagging strand of DNA
how are all the fragments glued togather
whats the difference between RNA and DNA
- RNA-single stranded,ribose sugar,Uracil
- DNA- doulbe stranded, deoxribose sguar, thymine
what are the 2 steps of protien synthesis
Transcription and Translation
Where is trancription and translation located?
- trancription: inside nucleus
- translation: @ a ribosome
Whats the function of polymerase RNA
Opens up and lays down mRNA
What are introns or extrons?
- introns: cut out
- extrons: fused in
What is a codon?
three base pairs that codes for a speific Amino Acid
What bond joins Amino Acid?
Whats a mutation and how does it happen?
- When somthing goes wrong with the codons.
- Two options:
- Point mutation =switch one letter
- Fram mutation = delete or insert of a codon
Whats a genome ?
the map of all you genes from all your chromosomes.
What restriction enzymes? why is it important to use the same restriction enzymes when trying to create recombination, DNA and during DNA fingerprinting?
they are enzymes that cut DNA , found in a viris or natrually in your body. You must use the same one so your ends fit togather. I fyou used differnet ones then you wouldny be able to identify the crimanal cause everyones one would be different
List the three types of RNA and define them
- mRNA - transribes
- rRNA-part of ribsome
- tRNA-carrys anticodon to the codon on mRNA
What is transcription?
copying or transcribing the message from the DNA