ap bio chapter 17 quiz
promoter
dna sequence which signals the point where transcription should begin
template strand
dna strand from which mrna is transcribed
rna polymerase
enzyme that unwinds dna and adds rna bases
either an insertion or a deletion of a base
a frameshift mutation could result from
proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU
a mutant cell has a defective aminoacyl trna synthetase that attaches a lysine to trnas with the anticodon AAA instead of the normal phenylalanine. the consequence of this for the cell will be that
5' UCA 3'
a particular triplet of bases in the template strand of dna is 3' AGT 5'. the corresponding codon for the mrna transcribed is
AAA
a particular triplet of bases in the template strand of dna is AAA. the anticodon on the trna that binds the mrna codon is
e site
a transfer rna (#1) attached to the amino acid lysine enters the ribosome. the lysine binds to the growing polypeptide on the other trna (#2) in the ribosome already. where does trna #2 move to after this binding of lysine to the growing polypeptide chain
point mutation
mutation a single nucleotide base
nonsense mutation
mutation that codes for a stop codon instead of the normal amino acid
silent mutation
mutation that has no effect on the amino acid that is produced
intron
non-coding region of a dna strand
A, P, E
place the three ribosome binding sites in order according to how trna molecules to bind to them during translation
a polypeptide missing an amino acid
the most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon. this results in
codon
three base mrna sequence that codes for an amino acid
transcription
transfer of genetic information from dna to rna
translation
transfer of genetic information from rna to protein
dna
which component is not directly involved in translation
it is found in mrna transcripts
which of the following is not true about the nitrogenous base thymine (T)
it never codes for more than one amino acid
which of the following is not true of a codon
bacteria have no nucleus to completely separate the two processes
which of these best explains why bacteria can begin translation before transcription is finished, but eukaryotic cells cannot