Question

The genetic code is a sequence of DNA nucleotides. In eukaryotic cells, the DNA is located in the nuclei of the cells. The genetic code is nearly universal in that
a) the same codons are assigned to the same amino acids in most living things.
b) the same codons are assigned to the same DNA sequences in most living things.
c) None of these are correct.
d) the same amino acids are assigned to the same DNA sequences in most living things.

Answer 1

The best  answer is A.

In most living  organisms, codons are assigned to the same amino acids.

Each amino acid is coded for by a set of three nucleotides in DNA. Each set of nucleotides is called a codon or triplet. The set of all possible three-nucleotide combinations is called the genetic code or triplet code. It is universal. 

These combinations are 64 in number. Of these, 3 do not code for any amino acid and are called non-sense codons, which leaves 61 which code for specific amino acids and are called sense codons.