Out of 64 possible codons, leucine has 6 codons. Is there any specific reason for this condition?

Question

Is leucine the most prevalent amino acid in the universe?

Is leucine more favoured than any other amino acid?

Answer 1

Leucine is, as some say, one of the most abundantly found amino acid in proteins. Why so??

Leucine is a hydrophobic amino acid. The way I see the structure, it has hydrophobic groups at one extremity and an OH group on the other hand. It is highly used for hydrophobic interactions.
Leucine is a non-polar amino acid. Non-polar amino acids dominate in proteins because the surface only is made-up of polar amino-acids while non-polar amino acids occupy the core of the protein which is away from water.

Also, leucine forms a structural motif in proteins called Leucine zippers which are a heptad of amino acids arranged in a zig-zag formation. This helps proteins having this motif to bind to DNA.
Transcription factors are known to have a leu-zipper motif.

Answer 2

B. each amino acid has greater suitable than one codon. that's the ideal answer, even though it is no longer strictly maximum suitable. Of the 20 amino acids detailed via the genetic code, 2 of them have in basic terms one codon.

Answer 3

Whatever is not as 'part, whole, equivalence, uniqueness, limit, link, sensation, influence, derivative, origin, condition, rule, intent, and fulfillment' is not unity.

Answer 4

AXE HAS GIVEN A GOOD ANSWER.