Question

Why can scientists compare the amino acid sequences of the proteins of three different living organisms?

A. because the genetic code is universal for all organisms
B. because the basic anatomy for all living organisms is the same
C. because RNA cannot be used to show evolutionary relationships
D. because the sequence of RNA is the same in all living organisms

Answer 1

Answer: A. because the genetic code is universal for all organisms

Step-by-step explanation:

The genetic code of living things refers to the information that cells in living organisms use to encode genetic information from the DNA and the RNA into proteins.

Every living organism uses the same genetic code and scientists believe this is because we all share a common history in terms of evolution. This homogeneity is advantageous because it enables scientists to be able to compare amino acid sequences across multiple living species.