True- the number of protons in an atom is also the atomic mass!!
The best answers are A and C
The complete question is
Comparison of a homeodomain protein from yeast and Drosophila shows that only 17 of its 60 amino acids are identical. How is it possible for a protein to change over 70% of its amino acids and still fold in the same way?
Answer:
Many different strings of the amino acid can give rise to the identical protein folds. The amino acid differences between the Drosophila and homeodomain proteins from yeast are the functional proteins which do not change their structure and function.
There is a several amount of folding required which can cause change in the protein structure.
There is a basic functional proteins common in both the organism which do not change its structure and function.
The answer should be a) always six. The chemical reaction is the process of molecule break down and form again. So the molecule will change but the atom will not change both type and number.
