Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
How many strands does an RNA molecule usually consist of? |
One
|
|
Genes provide...
|
... the instructions for making specific proteins.
|
|
What is TRANSCRIPTION?
|
The synthesis of RNA under the direction of DNA.
- The reulting RNA molecule is a faithful transcript of the gene's protein building instructions. |
|
What is TRANSLATION?
|
The actual synthesis of the polypeptide, which occurs under the direction of the mRNA.
|
|
Where does translation actually occur?
|
On RIBOSOMES.
|
|
Difference between prokaryotes and eukaryotes regarding TRANSCRIPTION and TRANSLATION?
|
Essentially the same. However, the important difference is in the glow of genetic information within the cells. B/c bacteria lacks nuclei, their DNA s not segregated from ribosomes and other protein synthesizing equipment.
|
|
What is a TRIPLET CODE?
|
The genetic instructions for a polypeptide chain that are writtien iat n the DNA as a series of nonoverlapping, thee nucleotide words.
|
|
What is a BASE TRIPLET called |
A CODON.
Each codon specifies an amino acid to be added to the growing polypeptide chain. |
|
What is the transcription rate in a eurkaryotic cell?
|
Approx. 60 nucleotides per second
|
|
How does the method of TERMINATION differ between prokaryotes and eukaryotes? |
Prokaryotes: transcription proceeds through a terminator sequence in the DNA.
Eurokayotes: the pre-mRNA is cleaved from the growing RNA chain while RNA polymerase II continues to transcribe DNA. |