Question

Francis Crick and Sydney Brenner used a chemical mutagen to insert one, two, or three nucleotides into the gene of a virus. When one or two nucleotides were inserted, protein synthesis was completely abolished. When three nucleotides were inserted, the protein was synthesized and functional.
If instead, it had happened that the protein was only synthesized and functional when two nucleotides were added, what would Crick and Brenner have concluded?

A

Option A: Three nucleotides specify each amino acid.  

B

Option B: Two nucleotides specify each amino acid.

C

Option C: Four nucleotides specify each amino acid.  

D

Option D: One nucleotide specifies each amino acid.

Answer 1

Option b

Note- crick has specified how three nucleotide code for one amino acid . But if two nucleotide can produce ons amino acid than they would have specifies how twp bases generate amino acid.