Translation - Protein Synethesis Flashcards
1
Q
- What does a ribosome attach to and where?
A
mRNA at the initiation codon
2
Q
- What does the ribsome enclose?
A
2 codons.
3
Q
- What is the first tRNA molecule attached to and what does it do?
A
Amino acid.
Diffuses to ribsome.
4
Q
- What does the tRNA molecules anticodon do?
A
It attaches to the first mRNA codon by complementary base pairing.
5
Q
- What does the next amino acid - tRNA do?
A
Attaches to the adjacent mRNA codon by complementary base pairing.
6
Q
- What happens to the bond between the amino acid and tRNA?
A
Its cut and a peptide bond is formed between the two amino acids,
7
Q
- What are these operations catalyzed by?
A
Enzymes in the ribsomes called ribozymes.
8
Q
- Where does the ribsome move along?
A
One codon so that anew amino acid-tRNA can attach.
9
Q
- What does the free tRNA molecule do?
A
Leaves to collect another amino acid.
10
Q
- WHAT HAPPENS AFTER THIS?
A
The cycle repeats from step 3.
11
Q
- What does the polypeptide chain do?
A
Elongates one amino acid at a time and peels away from the ribosome folding up into a protein as it goes.
12
Q
- When does this process stop?
A
When a stop codon is reached, when the ribsome falls apart releasing the finished protein.
