8.4 Study Guide Flashcards
1
Q
3 letters of mRNA that code for 1 amino acid
A
Codon
2
Q
Role of mRNA
A
Contains code for amino acid sequence
3
Q
Role of tRNA
A
Transfer amino acids
Contains anticodon that pair w/mRNA codons
4
Q
tRNA synthetase
A
synthesize tRNA w/its amino acids
5
Q
Match tRNA to codon in mRNA
A
A site
6
Q
Hold tRNA carrying polypeptide chain
A
P site
7
Q
tRNA goes back to cytoplasm
A
E site
8
Q
Change in base sequence in DNA molecule
A
Mutation
9
Q
Causes of mutations
A
DNA replication
Mutagens: radiation and chemicals
Viral infections
10
Q
Substitution of single base
(Ex: G for a C)
A
Point mutation
11
Q
Amino acid stays the same
A
Silent/synonymous
12
Q
Amino acid changes
A
Missense
13
Q
STOP protein occurs too early
A
Nonsense
14
Q
Insertions
Deletions
Shifts reading frame
A
Frameshift mutation
