Podcast
Questions and Answers
Which of the following is NOT a requirement for RNA polymerase during transcription?
Which of the following is NOT a requirement for RNA polymerase during transcription?
- A DNA template
- A divalent metal ion (Mg2+ or Mn2+)
- Deoxyribonucleoside triphosphates (correct)
- Ribonucleoside triphosphates
What is the role of RNA polymerase in the process of transcription?
What is the role of RNA polymerase in the process of transcription?
- Initiating and elongating RNA chains (correct)
- Assisting in protein synthesis at the ribosome
- Providing a primer for RNA synthesis
- Reading mRNA start and stop signals
In which direction does the synthesis occur during RNA and DNA synthesis?
In which direction does the synthesis occur during RNA and DNA synthesis?
- Bidirectional
- 3′-to-5′ direction
- Random direction
- 5′-to-3′ direction (correct)
What drives the synthesis of RNA during transcription?
What drives the synthesis of RNA during transcription?
Which nucleophilic attack occurs during the elongation of RNA chains?
Which nucleophilic attack occurs during the elongation of RNA chains?
What type of information do RNA polymerases take from DNA templates?
What type of information do RNA polymerases take from DNA templates?
What is the significance of the 'cap' structure added to the 5′ end of eukaryotic mRNA?
What is the significance of the 'cap' structure added to the 5′ end of eukaryotic mRNA?
Why are tRNAs called adaptor molecules in protein synthesis?
Why are tRNAs called adaptor molecules in protein synthesis?
Which part of the tRNA molecule attaches to the amino acid?
Which part of the tRNA molecule attaches to the amino acid?
How many nucleotides encode a single amino acid according to the genetic code?
How many nucleotides encode a single amino acid according to the genetic code?
What term describes the phenomenon where most amino acids are encoded by more than one codon?
What term describes the phenomenon where most amino acids are encoded by more than one codon?
What is the role of the poly(A) tail added to the 3′ end of eukaryotic mRNA?
What is the role of the poly(A) tail added to the 3′ end of eukaryotic mRNA?
What type of amino acid is carried by the initiator tRNA in prokaryotes during protein synthesis?
What type of amino acid is carried by the initiator tRNA in prokaryotes during protein synthesis?
Which sequence precedes the initiating AUG codon in prokaryotes and base pairs with ribosomal RNA?
Which sequence precedes the initiating AUG codon in prokaryotes and base pairs with ribosomal RNA?
What establishes the reading frame in protein synthesis by determining the order of three nonoverlapping nucleotides?
What establishes the reading frame in protein synthesis by determining the order of three nonoverlapping nucleotides?
Why is the genetic code nearly universal among most organisms?
Why is the genetic code nearly universal among most organisms?
In which organisms might we observe variations in the genetic code, such as codons typically representing stop codons encoding amino acids?
In which organisms might we observe variations in the genetic code, such as codons typically representing stop codons encoding amino acids?
What are the distinguishing features of eukaryotic genes that contribute to their mosaicism?
What are the distinguishing features of eukaryotic genes that contribute to their mosaicism?
