alleryStart learning →Which two jobs does the endoplasmic reticulum divide between its rough and smooth regions?
ACopying DNA and building ribosomes
BModifying proteins and making lipids
CStoring water and breaking down fats
DSorting proteins and tagging lipids
Answer & Solution
Correct answer: B. Modifying proteins and making lipids
1. The endoplasmic reticulum is a series of interconnected membranous sacs and tubules.
2. Collectively it modifies proteins and synthesizes lipids.
3. Those two functions are performed in separate areas, the rough ER and the smooth ER respectively.
4. Sorting and tagging are the Golgi's work, not the ER's, so that answer names the wrong organelle.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_
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