Podcast
Questions and Answers
What is the first step a cell takes in reading out its genetic instructions?
What is the first step a cell takes in reading out its genetic instructions?
To copy a particular portion of its DNA nucleotide sequence-a gene-into an RNA nucleotide sequence.
What is the name given to the process of copying DNA into RNA?
What is the name given to the process of copying DNA into RNA?
Transcription.
The information in RNA is written in a different language than DNA.
The information in RNA is written in a different language than DNA.
False (B)
Transcription produces RNA that is identical to the DNA strand it is copied from.
Transcription produces RNA that is identical to the DNA strand it is copied from.
What is the name of the enzyme that performs transcription?
What is the name of the enzyme that performs transcription?
RNA polymerase requires a primer to initiate transcription.
RNA polymerase requires a primer to initiate transcription.
Which of the following statements is NOT true about RNA polymerase?
Which of the following statements is NOT true about RNA polymerase?
The RNA strand produced during transcription remains bound to the DNA template strand.
The RNA strand produced during transcription remains bound to the DNA template strand.
What is the term for a transcribed segment of DNA?
What is the term for a transcribed segment of DNA?
What is the main difference between transcription in bacteria and eukaryotes?
What is the main difference between transcription in bacteria and eukaryotes?
What is the name of the detachable subunit of bacterial RNA polymerase that helps it recognize the start site for transcription?
What is the name of the detachable subunit of bacterial RNA polymerase that helps it recognize the start site for transcription?
RNA polymerase binds very tightly to the promoter DNA before initiating transcription.
RNA polymerase binds very tightly to the promoter DNA before initiating transcription.
What is the name of the DNA sequence that signals the end of transcription?
What is the name of the DNA sequence that signals the end of transcription?
Transcription termination involves a reversible structural change in the RNA polymerase.
Transcription termination involves a reversible structural change in the RNA polymerase.
What is the main purpose of promoter sequences in DNA?
What is the main purpose of promoter sequences in DNA?
Promoter sequences are symmetrical.
Promoter sequences are symmetrical.
What is the main consequence of the asymmetry of promoter sequences?
What is the main consequence of the asymmetry of promoter sequences?
The choice of template strand for transcription is determined by the location of the promoter.
The choice of template strand for transcription is determined by the location of the promoter.
Flashcards
Transcription
Transcription
The process of creating a copy of a gene from DNA into RNA.
RNA polymerase
RNA polymerase
The enzyme that performs the copying of DNA into RNA, creating the RNA strand.
Promoter
Promoter
A sequence of DNA that signals the start point for transcription. It's like the 'START' button for RNA polymerase.
Terminator
Terminator
Signup and view all the flashcards
Transcription unit
Transcription unit
Signup and view all the flashcards
Sigma (σ) factor
Sigma (σ) factor
Signup and view all the flashcards
RNA polymerase does NOT need a primer
RNA polymerase does NOT need a primer
Signup and view all the flashcards
RNA polymerase is less accurate
RNA polymerase is less accurate
Signup and view all the flashcards
RNA strand detaches
RNA strand detaches
Signup and view all the flashcards
RNA is NOT identical to DNA
RNA is NOT identical to DNA
Signup and view all the flashcards
Promoters are asymmetric
Promoters are asymmetric
Signup and view all the flashcards
Asymmetry of promoters: One direction transcription
Asymmetry of promoters: One direction transcription
Signup and view all the flashcards
Promoter determines template strand
Promoter determines template strand
Signup and view all the flashcards
RNA polymerase binds tightly to promoter
RNA polymerase binds tightly to promoter
Signup and view all the flashcards
Transcription termination: Reversible structural changes
Transcription termination: Reversible structural changes
Signup and view all the flashcards
Bacterial vs. Eukaryotic RNA polymerase
Bacterial vs. Eukaryotic RNA polymerase
Signup and view all the flashcards
First step of gene expression
First step of gene expression
Signup and view all the flashcards
