DNA Flashcards
1
Q
What are purines?
A
A and G
2
Q
What are pyrimidines?
A
C and T
3
Q
What is a transition mutation?
A
purine –> purine or pyrimidine –> pyrimidine
4
Q
What is a transversion mutation?
A
purine –> pyrimidine or pyrimidine –> purine
5
Q
What does the Shine-Dalgarno sequence do?
A
allows the ribosome to recognize and bind to the mRNA strand
6
Q
What are the sizes of prokaryotic ribosomal subunits?
A
30 and 50
7
Q
What are the sizes of eukaryotic ribosomal subunits?
A
40 and 60
8
Q
What do Aminoacyl-tRNA synthases do?
A
refill empty tRNA that exit the E site
9
Q
What does degenerate mean?
A
one amino acid can have multiple codons
10
Q
What does universal mean?
A
all organisms use same genetic table for amino acids
11
Q
What does unambiguous mean?
A
one codon can only code for one specific amino acid
