Question

Given below are the sequence of nucleotides in a particular mRNA and amino acids coded by it:
UUUAUGUUCGAGUUAGUGUAA
Phe-Met-Phe-Glu-Leu-Val
Write the properties of genetic code that can be and that cannot be correlated from the above given data.

Answer 1

The correct answer is given below:

Explanation:

mRNA:          UUU AUG UUC GAG UUA GUG UAA

Amino acid:   Phe  Met   Phe   Glu   Leu  Val    Stop

• The three letter nucleotides shown above represent the Codon.
• Each codon represents an amino acid.
• UUU refers to the amino acid Phenylalanine.
• AUG encode for amino acid Methionine.
• UUC refers to the amino acid Phenylalanine.
• GAG refers to the amino acid Glutamic acid.
• UUA refers to the amino acid Leucine.
• GUG refers to the amino acid Valine.
• UAA codes for the Stop Codon.
• In the mRNA sequence stop codon (UAA) is given.
• But no start codon (AUG) is shown.
• The second AUG codon cannot be the start codon as the amino acid sequence contains phenylalanine which is encoded by a codon (UUU) before the AUG codon.