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question 183
0.25 pts
figure 2.1
use the diagram above to answer the following questions.
which letter indicates the rough endoplasmic reticulum?
a
b
c
d
e

Explanation:

Step1: Recall rough ER structure

Rough endoplasmic reticulum (rough ER) has ribosomes on its surface and is involved in protein synthesis. It appears as a series of folded membranes with ribosomes (the small dots) attached.

Step2: Analyze the diagram labels

• Label A: Likely the nucleolus (inside nucleus).
• Label B: Cell membrane or nuclear envelope? No, rough ER has ribosomes.
• Label C: The structure with ribosomes (small dots) on its membranes, folded sheets—matches rough ER.
• Label D: Cytoplasm or other organelle without ribosomes.
• Label E: Mitochondrion (has a folded inner membrane, no ribosomes on surface).

Answer:

C