What molecule carries individual amino acids from the cytoplasm to the ribosome for protein assembly?

What molecule carries individual amino acids from the cytoplasm to the ribosome for protein assembly?

• A. DNA
• B. tRNA
• C. mRNA
• D. ATP

Answer: (B)

The molecule that carries individual amino acids from the cytoplasm to the ribosome for protein assembly is transfer RNA, commonly known as tRNA. tRNA plays a crucial role in the process of translation, which is part of protein synthesis. Each tRNA molecule is specific to a particular amino acid and has an anticodon region that pairs with the corresponding codon on the messenger RNA (mRNA) strand during translation. This pairing facilitates the accurate addition of amino acids to the growing polypeptide chain, ensuring that proteins are synthesized according to the genetic information encoded in the mRNA. The structure of tRNA allows it to simultaneously bind to an amino acid and the ribosome, effectively bringing the right building blocks to the site of protein assembly. Other molecules like DNA serve as the genetic blueprint, mRNA acts as the intermediary that carries genetic information from the DNA to the ribosome, and ATP is an energy currency for cellular processes, but none of these are responsible for transporting individual amino acids during protein synthesis.

The molecule that carries individual amino acids from the cytoplasm to the ribosome for protein assembly is transfer RNA, commonly known as tRNA. tRNA plays a crucial role in the process of translation, which is part of protein synthesis. Each tRNA molecule is specific to a particular amino acid and has an anticodon region that pairs with the corresponding codon on the messenger RNA (mRNA) strand during translation.

This pairing facilitates the accurate addition of amino acids to the growing polypeptide chain, ensuring that proteins are synthesized according to the genetic information encoded in the mRNA. The structure of tRNA allows it to simultaneously bind to an amino acid and the ribosome, effectively bringing the right building blocks to the site of protein assembly.

Other molecules like DNA serve as the genetic blueprint, mRNA acts as the intermediary that carries genetic information from the DNA to the ribosome, and ATP is an energy currency for cellular processes, but none of these are responsible for transporting individual amino acids during protein synthesis.