QQuestionBiology
QuestionBiology
"Which phrase best describes rough ER?
A. Studded with ribosomes
B. Fewer solutes than the cell
C. Stored in the central vacuole
D. Protected by vesicles"
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Answer
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Step 1:Let's solve this biology problem step by step:
Step 2:: Understand the Rough Endoplasmic Reticulum (Rough ER)
The rough endoplasmic reticulum is a key cellular organelle characterized by its distinctive appearance. The term "rough" comes from the presence of ribosomes attached to its surface, which gives it a bumpy or "rough" texture.
Step 3:: Analyze the Given Options
A. Studded with ribosomes B. Fewer solutes than the cell C. Stored in the central vacuole D. Protected by vesicles
Step 4:: Evaluate the Characteristics of Rough ER
- Ribosomes are protein-synthesizing structures that attach to the surface of the rough ER - These ribosomes are critical for protein production and modification - The presence of ribosomes is the defining feature that distinguishes rough ER from smooth ER
Step 5:: Eliminate Incorrect Options
- Option B is incorrect: Solute concentration is not a defining characteristic of rough ER - Option C is incorrect: Rough ER is not stored in a central vacuole - Option D is incorrect: Rough ER is not protected by vesicles
Step 6:: Identify the Correct Answer
The correct answer is A: Studded with ribosomes.
Final Answer
Studded with ribosomes Explanation: Rough endoplasmic reticulum is characterized by the presence of ribosomes attached to its membrane surface, which gives it its "rough" appearance and enables protein synthesis and modification within the cell.
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