Chapter 17 Flashcards
1
Q
What is the TATA Box
A
A crucial promoter DNA sequence
2
Q
Describe the 3 sites for tRNA binding on a ribosome
A
The P site holds the tRNA carrying the polypeptide chain. The A site holds the tRNA carrying the next amino acid to be added to the chain. The tRNA leaves the ribosome from the E site
3
Q
Nucleotide pair substitution
A
The replacement of one nucleotide and its partner with another pair of nucleotides
4
Q
Silent mutation
A
Has no observable effect on the phenotype
5
Q
Missense mutations
A
Subsitutions that change one amino acid to another
6
Q
Nonsense mutation
A
Changes a codon for an amino acid into a stop codon
7
Q
Reading frame
A
The triplet grouping of nucleotides on the mRNA that is read during translation
