Answer : cathode, protocathode
During an electrochemical reaction, electrons move through the external wire toward the cathode and positive ions in the salt bridge move toward the protocathode.
Frame shift, possibly new amino acids instead of the original
Proteins are made up of chains of small organic molecules called amino acids such as glycine, alanine, lysine or tryptophan.
The right answer is C.
When transcribing the TCA and TAA DNA, this gives respectively AGU and AUU.
AGU encodes a serine, which is a hydrophilic amino acid.
AUU encodes a hydrophobic amino acid which is isoleucine.
If we change the TCA codon to TAA, we will have serine change by isoleucine, so it is clear that the conformation of the protein will change.