Multiple Choice
In eukaryotic cell architecture, which of the following is considered a cytoplasmic inclusion rather than an organelle?
1. Overview of Cell Biology
Eukaryotic Cell Architecture
Multiple Choice
In eukaryotic cells, which organelle is correctly paired with its primary function?
A
Smooth endoplasmic reticulum — packaging and sorting of proteins into secretory vesicles
B
Lysosome — transcription of nuclear DNA into mRNA
C
Rough endoplasmic reticulum — synthesis of secreted and membrane proteins by ribosomes bound to its surface
D
Golgi apparatus — ATP production by oxidative phosphorylation
Verified step by step guidance1
Step 1: Identify the primary functions of each organelle listed in the problem. Recall that the smooth endoplasmic reticulum (SER) is mainly involved in lipid synthesis and detoxification, not protein packaging.
Step 2: Understand that lysosomes are responsible for breaking down macromolecules and cellular waste, not for transcription, which occurs in the nucleus.
Step 3: Recognize that the rough endoplasmic reticulum (RER) has ribosomes attached to its surface, making it the site for synthesis of secreted and membrane proteins.
Step 4: Recall that the Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles, but it is not involved in ATP production; ATP production occurs in mitochondria.
Step 5: Based on these functions, match each organelle to its correct primary function and confirm that the rough endoplasmic reticulum is correctly paired with the synthesis of secreted and membrane proteins.
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