Flashcards in Week 9 Deck (62)
Name the three RNAs
Name the two processes in protein synthesis
Copy of blueprint of DNA
Cope of just one gene
Taking the message and making it into protein
No two genetic codes are alike
We need to get the message for each one, where it starts and ends
Name two examples of codons
Codons will code for a specific amino acid
Codons are three nucleotides long
We need to have at least 20 codons (=20 amino acids)
What do you call the start codon?
What do you call the end codon?
What enzyme opens up DNA for transcription?
Example of Transcription
What are introns?
Nonsense triplets, they are cut out (we don't use, except for reading your DNA in genetic testing)
What are exons?
Informational triplets (edited version)
When do we have a message?
After cutting out the introns we have a message
What happens after transcription?
DNA closes back up, the mRNA strand leaves the nuclear membrane and meets up w/either a free-floating ribosome or one attached to the rough ER
What's the function of ribosomes?
They act as translation stations
What do transfer RNAs carry?
Amino acids & the anticodon
A sequence of three nucleotides forming a unit of genetic code in a transfer RNA molecule, corresponding to a complementary codon in messenger RNA.
What is translation?
mRNA is read with an anticodon that is on a tRNA the corresponding amino acid will bond to the polypeptide chain. (See box 3-3 on pg.83)
Gene expression can be ...
...turned on and off.
Not all cells will express ...
... all genes.
What do cells in the pancreas produce?
What do cells in muscles produce?
Actin and Myosin
What is it called when plants know to stop growing?
The space between two neurons
Transmitting messages across the synapse (space)
Define synaptic transmission
Transmission of nerve impulses; nerve releases chemical stimulus to next neuron
Where the impulse comes from