BISC 261 Final Exam (Graded A+) with Questions
with 100% Correct Answers
steps involved in DNA synthesis at the replication fork - Answer 1) replication
fork formation
2) primer binding
3) elongation
4) termination
how do DNA polymerases correct their mistakes - Answer they proofread every
newly added base and incorrect bases are removed and replaced by the correct base
which strand of a gene has sequences that correspond to the start and stop codons
in the mRNA product of the gene? - Answer the template strand
4 phases of bacterial transcription cycle - Answer 1) promoter recognition
2) initiation
3) elongation
4) termination
RNA polymerase core enzyme - Answer catalyzes RNA synthesis, elongation
, core enzyme - Answer completes RNA synthesis, termination
sigma factor - Answer controls the binding of RNA polymerase to the promoter,
initiation
RNA polymerase holoenzyme - Answer a sigma bound to a core enzyme,
begins transcription, elongation
polycistronic mRNA - Answer mRNA that has more than one coding region; formed
when an operon is transcribed
consensus sequence - Answer commonly occurring sequence of nucleotides within
a genetic element
what is the difference between a codon and an anticodon - Answer
which direction are polypeptides synthesized? - Answer 5'-3'
what is a polyribosome and why is it useful? - Answer a polyribosome is a complex
of mRNA with several ribosomes, allows for rapid translation rates.
why are genes and operons translated at the transcriptional level? - Answer the binding
of proteins to the specific sites on DNA happen during transcription.
induction vs repression - Answer induction is when the amount of enzyme increases
and repression is the opposite.
with 100% Correct Answers
steps involved in DNA synthesis at the replication fork - Answer 1) replication
fork formation
2) primer binding
3) elongation
4) termination
how do DNA polymerases correct their mistakes - Answer they proofread every
newly added base and incorrect bases are removed and replaced by the correct base
which strand of a gene has sequences that correspond to the start and stop codons
in the mRNA product of the gene? - Answer the template strand
4 phases of bacterial transcription cycle - Answer 1) promoter recognition
2) initiation
3) elongation
4) termination
RNA polymerase core enzyme - Answer catalyzes RNA synthesis, elongation
, core enzyme - Answer completes RNA synthesis, termination
sigma factor - Answer controls the binding of RNA polymerase to the promoter,
initiation
RNA polymerase holoenzyme - Answer a sigma bound to a core enzyme,
begins transcription, elongation
polycistronic mRNA - Answer mRNA that has more than one coding region; formed
when an operon is transcribed
consensus sequence - Answer commonly occurring sequence of nucleotides within
a genetic element
what is the difference between a codon and an anticodon - Answer
which direction are polypeptides synthesized? - Answer 5'-3'
what is a polyribosome and why is it useful? - Answer a polyribosome is a complex
of mRNA with several ribosomes, allows for rapid translation rates.
why are genes and operons translated at the transcriptional level? - Answer the binding
of proteins to the specific sites on DNA happen during transcription.
induction vs repression - Answer induction is when the amount of enzyme increases
and repression is the opposite.
