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Protein synthesis, transcription, translation
the purpose of ______ is for expressing genes in the format of proteins, includes ___ and _____
transcription, cytoplasm, nucleus
___ is the synthesis of RNA under direction of DNA
produces mRNA in prokaryotes and pre mRNA in eukaryotes
takes place in ____ for prokaryotes and ____ for eukaryotes
translation, ribosomes, cytoplasm
____ is the synthesis of a polypeptide, occurs under direction of mRNA
the site is at the _____ which are in the _____ for prokaryotes and eukaryotes
prokaryotes, cytoplasm
DNA→mRNA→Proteins
Protein synthesis in (prokaryotes/eukaryotes) occurs in the _____
eukaryotes, nucleus, cytoplasm
DNA→pre mRNA→mRNA→Proteins
protein synthesis in (prokaryotes/eukaryotes) occurs in the _____ and ____
triplet code
series of nonoverlapping, three nucleotide words
smallest unit of uniform length that can code for all AA
template strand, 5’ to 3’, codon, anticodon
____provides template for order of nucleotides in RNA transcript
mRNA base triplets (codons) read from ____
____ specifies the AA to be places in corresponding positions along the polypeptide
____ is complimentary to codons on mRNA
Central Dogma
a theory that genetic info only flows in one direction
DNA[gene]→mRNA→Proteins[trait]
eukaryotes, nucleus, prokaryotes, disposable
mRNA is used in ___ to leave the ____ bcs DNA cannot leave it normally
In ____ it is used bcs it is ____ if their is an error bcs damage in mRNA > damage to DNA
initiation, TATA box, RNA Poly II, promoter, ribosomal, mRNA, transfer
Step 1 Transcription ____:
GTFs recognize and bind to the ____of an active gene allowing ______ to bind to the ____
RNA polymerases have the same properties as DNA polymerases and all act as Helicase
RNA Poly I: rRNA(_____), RNA Poly II:___, RNA Poly III: tRNA(____)
elongation, RNA Poly II, RNA, template strand, 5’ to 3’, 3’ to 5’
Transcription step 2 ______:
______ unzip/separates the 2 strands of DNA and attatches ___ nucleotides to the 3’ to 5’ strand (_____)
mRNA is made and read from ____
the template strand is read from ____
termination, RNA Poly II, terminator, RNA editing
transcription step 3 _____:
_____ reaches the _____. the pre-mRNA terminator releases the RNA Poly II and Pre mRNA
the RNA Poly II will then find a promoter with GTFs and the Pre-mRNA goes through _____
overview, intron, exon
RNA Editing Step 1 _____:
_____: non coding sequence, evolutionary trait to protect against mutations
_____: coding sequence
spliceosome, proteins, snRNPs, catalyzes, introns, exons, snRNPs
RNA Editing Step 2:
_____ attach btwn the introns and exons to break the bonds connecting them, it is made up of _____ and _____. It ____ the process of removing _____ and joining ______.
_____ section of the spliceosome identifies the introns and exons. The are small nuclear Ribonucleoproteins.
exons, methyl cap, Poly A Tail, translation initiation, export, energy, nucleus, stability, degredation, exonucleus
RNA Editing Step 3:
all introns are removed leaving only ____. There are caps added to the DNA the _____ at 5’ and the ____ at 3’. This creates the mRNA
The 5’ methyl cap aids with ________, with the Ribosome and ____. It also provides _____
the Poly A Tail at 3’ aids with export outside the ____ and the ____ of mRNA
The caps protect the mRNA form ____ by the immune system and exonucleus (mostly poly-a-tail_
the ____ breaks down enzymes
Alternative splicing, exons, proteins, pleitropy
part of RNA editing step 3 _____: spliceosome can cut some ____ from the final mRNA which results in different _____
1 gene→multiple mRNA→multiple proteins/traits
ex of _____
remove introns
the purpose of RNA Editing is to ______
initiation, nucleus, small, anticodon, codon, large, 5’ to 3’
Translation Step 1 ______:
The mRNA exits the ____, the ___ unit attached to it and finds the start codon
the starting codon is brought by a tRNA and carries the first tRNA, Met
_____ from tRNA compliments ____ from mRNA
The ____ unit of the ribosome reads the mRNA from ______ with three sites
codon
a three nucleotide sequence that codes for a single AA
anticodon
three letter nucleotide sequence that carries the AA coded by a codon
A site, P site, E site
the large unit of the ribosome has three sites
____: new codon is read for a new tRNA with the next AA
____: the current tRNA holds the growing polypeptide
____: tRNA with no AA exits the ribosome
Elongation, A site, anticodon, codon, p site, polypeptide, a site, peptide bond, ribosome, exits
Translation Step 2 ____:
as the ribosome reads the next codon in the ____, the corresponding tRNA enters the ribosome and its ____ compliments the mRNAs ___.
the tRNA in the ____ transfers its growing ____ to the AA in the ___ by making a ____.
the tRNA in the E site already transferred its AA after the last movement of the ____ and ___ the complex
peptide bond, dehydration synthesis
a _____ links amino acids, it is made by ______
termination, stop codon, release factor, a site, GTP, ribosome, polypeptide, mRNA, reused or broken down
Translation Step 3 _____:
eventually the ribosome will reach the ____ in the mRNA
the _____ attatches to the ___ with a ____ and triggers the termination of protein synthesis
Outcomes: ___: finds another mRNA, ____:performs its intended function, ___:it can either be __________ into nucleotides back to the nucleus. it depends on the need of the protein by the cell/organism
stop codon
codon that codes for a release factor, not an AA
UAG/UAA/UGA
Mutations, neutral, negative, positive
____ are random changes in the genetic material of a cell that could cause a change in the protein expression
there are three outcomes:
____: the change in genetic material makes same protein
____: the change causes protein to not function or have harmful effects of cell
____: the change causes protein to have better or new function for cell
chromosomal mutation
a chromosome is added/removed, always results in disorders/death
Gene/point mutation, base pair substitution, frameshift
___________ is a change on one nucleotide base pair of a gene, occurs when a single base pair is changed, added, or deleted.
_____ replaces one base pair with another
_____ the mRNA ends up having more or less nucleotide base pairs and produces no functional proteins
missense, nonsense, silent
Base Pair substitutions outsomes
____: the change causes it to code for a different AA
____: the change causes it to code for a stop codon
____: the change causes no change in the AA
frameshift mutation
caused by insertion and deletion
spontaneously, DNA Poly, mutagens, variation, genetic makeup
Causes of Mutations
they can occur _____, or _____ can make a mistake
it can be cause by ____ in the enviorment
can introduce ____to a population, passing it on leads to a change in ______ overtime (evolution)
Mutagen
____ is any agent that changes the DNA of an organism
Ex: chemicals and radiation (UV light, x rays) can damage DNA
body cells
a mutation in _____ cannot be passed on
sex cells
a mutation in ____ can be passed on
gene regulation in eukaryotes
______: the process in which a cell controlls which genes are expressed. leads to each cell type having different sets of active genes and different patterns of gene expression. leads cell to have specialized functions. has many steps that can be regulated
chromatin accessibility, transcription, RNA editing
Gene regulation
_____: DNA Methylation and Histone Acetylation
_____: Sets of transcription factors (GTFs) bind to gene’s promoers and start transcription of into pre-mRNA
_____ Processing/____: splicing, capping, and addition of a Poly A-Tail to an RNA can be regulated, different mRNAs may be form the same pre-mRNA by alternative splicing
Histone acetylation, positvely, negatively, acetyl, reduced, less, higher, more, lower
______alters accessibility of chromatic and allows transcription factors to interact with the exposed sites to activate gene transcription
histones are ___ charged, acetyl groups and DNA are ___ charged
when ____ groups are added to segments of a histone, the attraction between the DNA is ____.
histones WITH acetyl groups, ___ interaction btwn histones and DNA, ____ rate of transciption.
histones WITH NO Acetyle groups, _____ interaction btwn histones and DNA, ____ rate of transcription.
Negative Effects; lower histones acetylation related to neurodegeneration and epithelial cancers