216,383 views
28 votes
28 votes
A student observes an organelle within a eukaryotic cell while looking through a microscope. The structureis composed of membranous tubules and sacs and is covered with numerous smaller structures. Which ofthe following is the MOST likely function of the organelle?A. protein modificationB. macromolecule hydrolysisC. protein synthesisD. lipid synthesis

User Bertdida
by
2.4k points

1 Answer

10 votes
10 votes

The organelle being observed is the endoplasmic reticulum (ER). There are two types of ER: rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). The ER is the port of entry of protein synthesis and modification of proteins and is characterized by membranous tubules and sacs. Since there are smaller structures (called ribosomes) near the organelle, it is most likely the RER.

ANSWER: A. modification of proteins. From the ribosomes where the proteins are made, it goes to the endoplasmic reticulum for refinement or modification. Once the modified protein is complete, it leaves the endoplasmic reticulum inside a sac that detaches off the organelle.

A student observes an organelle within a eukaryotic cell while looking through a microscope-example-1
User Elfentech
by
3.0k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.