Revision Questions : Process of Transcription and Translation

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Question 1: In gene transcription, RNA polymerase is used to synthesize mRNA on a __________ template.
  • INCORRECT! Please try again.
  • CORRECT! After unzipping the double stranded DNA, one strand acts as a template for RNA synthesis.
  • INCORRECT! Please try again.
  • INCORRECT! Please try again.
Question 2: Which of the following enzyme is responsible for separating DNA strands in transcription?
  • INCORRECT! This enzyme is responsible for DNA replication.
  • INCORRECT! This is the enzyme for copying DNA into RNA.
  • INCORRECT! This is the enzyme that cuts DNA by catalyzing the cleavage of phosphodiester bonds.
  • CORRECT! This is the enzyme to unzip DNA by hydrolyzing hydrogen bonds between the two DNA strands.
Question 3: Which of the following is involved in translation?

  • (1) tRNA
  • (2) mRNA
  • (3) RNA polymerase

  • CORRECT! tRNA and mRNA are involved in translation.
  • INCORRECT! RNA polymerase is involved in transcription.
  • INCORRECT! RNA polymerase is involved in transcription.
  • INCORRECT! RNA polymerase is involved in transcription.
Question 4: For the genetic code that code for the amino acids, the number of
  • INCORRECT! There are 64 codons, including stop codons but only 50 tRNAs in eukaryotes.
  • INCORRECT! There are 4 nucleotides giving 64 codons.
  • CORRECT! 61 codons, excluding stop codons, code for 20 amino acids.
  • INCORRECT! 61 codons, excluding stop codons, code for 20 amino acids.
Question 5: A gene composed of 30 nucleotides can make a polypeptide of no more than _____ amino acids after transcription and translation.
  • CORRECT!
  • INCORRECT! 3 nucleotides code for 1 amino acid.
  • INCORRECT! 3 nucleotides code for 1 amino acid.
  • INCORRECT! 3 nucleotides code for 1 amino acid.