Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells?
A) Prokaryotes cannot secrete proteins because they lack an endomembrane system.
B) Proteins secreted by prokaryotes are likely synthesised on ribosomes bound to the cytoplasmic surface of the plasma membrane.
C) The mechanism of protein secretion in prokaryotes is probably the same as that in eukaryotes.
D) Prokaryotes cannot secrete proteins because they lack rough endoplasmic reticulum.

Question

Quizplus · Accepted Answer

Prokaryotes lack an endomembrane system, but they can secrete proteins by using the plasma membrane. Protein synthesis occurs on ribosomes bound to the cytoplasmic surface of the plasma membrane. The mechanism of protein secretion in prokaryotes is different from that in eukaryotes. Prokaryotes lack rough endoplasmic reticulum, which is involved in protein synthesis and modification in eukaryotic cells, but they have other mechanisms to modify and secrete proteins.

Which of the Following Statements Correctly Describes Some Aspect of Protein