DNA & Protein Synthesis (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What key experimental material did Nirenberg use to decipher the genetic code?
What key experimental material did Nirenberg use to decipher the genetic code?
Synthetic mRNA molecules
Why were cell extracts treated with DNase in Nirenberg's experiments?
Why were cell extracts treated with DNase in Nirenberg's experiments?
To remove genomic DNA
Which radioactive isotope was used to label phenylalanine in the key experiment?
Which radioactive isotope was used to label phenylalanine in the key experiment?
Carbon-14
Which synthetic mRNA produced the highest radioactivity with labelled phenylalanine?
Which synthetic mRNA produced the highest radioactivity with labelled phenylalanine?
Poly U
Which amino acid is coded for by the codon UUU?
Which amino acid is coded for by the codon UUU?
Phenylalanine
How many possible triplet codons exist in total?
How many possible triplet codons exist in total?
64
How many codons serve as stop codons to terminate translation?
How many codons serve as stop codons to terminate translation?
3
What does it mean that the genetic code is degenerate?
What does it mean that the genetic code is degenerate?
Multiple codons code for one amino acid
Is the genetic code ambiguous?
Is the genetic code ambiguous?
No, each codon codes for one amino acid
How did Khorana extend Nirenberg's work on the genetic code?
How did Khorana extend Nirenberg's work on the genetic code?
Creating longer repeating sequences