The ribosome is thought to be:
A) an example of a catalyst that has survived from the RNA world.
B) unique to eukaryotes.
C) a ribozyme.
D) A and C.
E) A, B, and C.

Question

Quizplus · Accepted Answer

The ribosome is a complex molecular machine that catalyzes the formation of peptide bonds between amino acids during protein synthesis. It is made up of both protein and RNA components, and its RNA component, called ribosomal RNA (rRNA), acts as a ribozyme, catalyzing the peptide bond formation. This suggests that the ribosome has evolved from an RNA entity that was present in the RNA world, and therefore, Choice A is correct. Moreover, the ribosome is found in all living organisms, including prokaryotes and eukaryotes, making Choice B incorrect. Therefore, the correct choice is D, A and C.

The Ribosome Is Thought to Be