A deletion of one base usually has a greater effect than a substitution because

  1. it causes a frameshift changing all following codons
  2. it adds a stop codon at the start
  3. it never changes the protein
  4. it changes only one amino acid
Answer

A) it causes a frameshift changing all following codons

All codons after it are altered. AS & A Level Biology · Topic 6 Nucleic Acids and Protein Synthesis · 6.2 Protein synthesis

Biology MCQ · More A Level Biology: Nucleic acids and protein synthesis MCQs · Practise