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Question
In protein synthesis, the polymerisation of amino acids involves three steps. Which of the following step is not involved in protein synthesis?
In protein synthesis, the polymerisation of amino acids involves three steps. Which of the following step is not involved in protein synthesis?
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Solution
The correct option is B Transcription
Translation or protein synthesis happens in three stages - initiation (start), elongation (make longer), and termination (stop). These terms describe the growth of the amino acid chain (polypeptide).
- Initiation: The ribosome binds to the mRNA at the start codon (AUG) that is recognised only by the initiator tRNA.
- Elongation: Amino acids linked to tRNA sequentially bind to the appropriate codon in mRNA. Amino acids are added one by one and translated into polypeptide.
- Termination: The stop codon is encountered which results in termination of translation and releasing the complete polypeptide from the ribosome.
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). It is not a step of protein synthesis.
Translation or protein synthesis happens in three stages - initiation (start), elongation (make longer), and termination (stop). These terms describe the growth of the amino acid chain (polypeptide).
- Initiation: The ribosome binds to the mRNA at the start codon (AUG) that is recognised only by the initiator tRNA.
- Elongation: Amino acids linked to tRNA sequentially bind to the appropriate codon in mRNA. Amino acids are added one by one and translated into polypeptide.
- Termination: The stop codon is encountered which results in termination of translation and releasing the complete polypeptide from the ribosome.
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