Answer:
Comparative biochemistry. (Ans. B)
Step-by-step explanation:
Comparative biochemistry: It is defined as the study of evolutionary relationship present between organisms, by comparing the deference, and similarities present in these genes. It is helping in the study enzymes, and protein machines, but both are encoded with the help of DNA sequences. It is helping to determine the comparison of the structure of cytochrome c from different organisms to infer evolutionary relationships.
Genes are inherited to offsprings from parents, and made up of DNA. Some DNA are codes for mRNA, later they are helping to code amino acid sequence of protein. Cytochrome C involved in using energy in the cell, and it is a protein.