Protein Synthesis Flashcards
Stop codons code for …
no amino acid
Damage to DNA can be caused by
UV Radiation
How does RNA differ from DNA?
It contains uracil and is single stranded
What is the flow of genetic information
DNA-RNA-Proteins
What is the transcription start signal?
The promoter
3 codons that don’t signify amino acids are
stop codons
DNA is composed of 2 strands, by what mechanism is the right one chosen?
The promoter aims the RNA polymerase
How many different polymerases are in eukaryotes?
3
Which molecule transfers information from one generation to the next?
DNA
Which molecules transfer information from RNA to proteins?
tRNA
3 RNA bases function as both…
codons and anticodons
Ribosomes are a collection of … and … that are needed for …
proteins and small RNAs , translation
what events must take place to ensure that the protein made Is the one specified by the mRNA?
tRNA must read mRNA correctly and tRNA must carry the amino acid correct for the reading
The enzyme that charges the tRNA molecules with appropriate amino acids is
aminoacyl RNA synthetase
During translation initiation, the 1st site occupied by a tRNA is the
p site
Breaking and rejoining of chromosomes can lead to
a. deletions.
b. duplications.
c. inversions.
d. translocations.
all of the above
What do genes code for?
a. enzymes.
b. polypeptides.
c. RNA.
All of the above
Which molecules transfer messages to the cytoplasm?
mRNA
Transcription is the process of…
the process by which the information in a strand of DNA is copied into a new molecule, RNA being produced
Mutations are changes in the sequence of
Dna bases
What is the first step of protein synthesis called?
Transcription
What is the second step of protein synthesis called?
Translation
Where does the first step occur?
In the nucleus
Where does the second step occur?
in the cytoplasm on the ribosome
