Which of the following enzymes is directly associated with polypeptide formation, and has the function...

BIOLOGYSAT 2021

Which of the following enzymes is directly associated with polypeptide formation, and has the function of binding amino acids to each other at the ribosome?

  • A. tRNA synthetase
  • B. Ligase
  • C. Peptidyl transferase
  • D. ATP synthase

Correct Answer: C. Peptidyl transferase

Explanation

Peptidyl transferase is the enzyme that works in conjunction with tRNA molecules to extend a growing polypeptide chain at the ribosome during translation. Ligase is not used at all in translation, nor is topoisomerase or ATP synthase. tRNA synthetase is used to bind the correct amino acids to corresponding tRNA molecules, but it is not used to extend the polypeptide at the ribosome.

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