Question

Place the following steps of endomembrane system function in the correct order.

Answer 1

Answer:

D

Explanation:

The correct option here would be D.

The endomembrane system refers to a group of membrane-based organelles whose primary function is to synergistically work together to modify, package, and transport lipids and proteins. The system includes organelles such as the lysosome, the nuclear envelope, the endoplasmic reticulum, and the Golgi apparatus.

For an endomembrane system function involving a protein, the protein would first of all need to be synthesized by the ribosome - the free ones or the ones attached to the rough endoplasmic reticulum. Thereafter, the synthesized protein would then be folded or packaged into transportable vesicles. The vesicles are then received by the Golgi apparatus which further modifies the proteins before transporting them accordingly.

Hence, the correct order of a typical endomembrane system function would be:

1. Ribosomes on the RER synthesize proteins.
2. Proteins are packaged into transport vesicles.
3. Golgi apparatus receives transport vesicles from the RER.
4. Proteins are modified by the Golgi apparatus.
5. Modified proteins may be secreted from the cell by exocytosis.