JIPMER 2009
- Exam
- JIPMER
- Year
- 2009
- Subject
- Zoology
- Chapter
- Molecular Basis of Inheritance
JIPMER 2009 · Zoology · Molecular Basis of Inheritance
Initiation codon is
Initiation codon is
Options
- AUUU
- BUGA
- CAUG
- DUAG
Correct answer
C. AUG
Step-by-step solution
AUG which codes for methionine (Met) is used as start signal in protein synthesis. It is the most common chain initiation codon.
In prokaryotes, the codons GUG and UUG are also employed in instances as start codons.
Three triplets,UAA (ochre),UAG (amber) andUGA (opal) do not code for any amino acid and are callednon-sense codons. Their function is to terminate the message for gene controlling protein synthesis. Non-sense codons are also calledchain termination codons.
UUU (uracil) codes for phenylalanine.