Amino acids are substituted______

Which amino acid is substituted in sickle cell anamia ?

Which amino acid is substituted in sickle cell anamia ?

Which amino acid is substituted in sickle cell anamia ?

Amino acid substituted in sickel cell anamia is

The amino acid substituted in sickle cell anemia is

Which is the main amino acid from which other amino acids are synthesized ?

Following table shows data on amino acid substitution in the alpha chain of haemoglobin in four different mammalian species A,B,C and D on the basis of the data shown in the table. Choose the most appropriate evolutionary tree from those given below.

Amino acids can be classified into essential amino acids and non essential amino acids.Write one example each for essential and non-essential amino acids.