GENERAL HISTOLOGY

INTRODUCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the function of the rough endoplasmic reticulum?
A
to make energy
B
modify and transport proteins made by the ribosomes on it
C
store water and other vital molecules
D
to make new membranes and neutralize toxins
Explanation: 

Detailed explanation-1: -The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

Detailed explanation-2: -Since the rough ER helps modify proteins that will be secreted from the cell, cells whose job is to secrete large amounts of enzymes or other proteins, such as liver cells, have lots of rough ER.

Detailed explanation-3: -Rough Endoplasmic Reticulum Function: The majority of the functions of rough ER is associated with protein synthesis. The rough endoplasmic reticulum also plays a vital role in protein folding. Also ensures quality control (regarding correct protein folding).

Detailed explanation-4: -In the RER lumen, proteins may undergo slight modifications, such as having their signal sequences cleaved or undergoing glycosylation (in which an oligosaccharide is added, producing a glycoprotein). Protein form also changes, whereby the molecule assumes its three-dimensional conformation.

Detailed explanation-5: -Explanation: The primary function of endoplasmic reticulum is the synthesis of proteins.

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