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Multiple Choice
What is the main difference between rough endoplasmic reticulum and smooth endoplasmic reticulum?
A
Rough endoplasmic reticulum has ribosomes attached to its surface, while smooth endoplasmic reticulum does not.
B
Rough endoplasmic reticulum is responsible for detoxification, while smooth endoplasmic reticulum is responsible for calcium storage.
C
Rough endoplasmic reticulum is found only in animal cells, while smooth endoplasmic reticulum is found only in plant cells.
D
Rough endoplasmic reticulum is involved in lipid synthesis, while smooth endoplasmic reticulum is involved in protein synthesis.
Verified step by step guidance
1
Begin by understanding the structure and function of the endoplasmic reticulum (ER), which is an essential organelle in eukaryotic cells. It is divided into two types: rough ER and smooth ER.
Identify the structural difference: Rough ER has ribosomes attached to its cytoplasmic surface, giving it a 'rough' appearance under a microscope. Smooth ER lacks these ribosomes, hence its 'smooth' appearance.
Explore the functional differences: Rough ER is primarily involved in the synthesis and processing of proteins due to the presence of ribosomes. These proteins are often destined for secretion or for use in the cell membrane.
Understand the role of smooth ER: It is involved in lipid synthesis, metabolism of carbohydrates, detoxification of drugs and poisons, and storage of calcium ions. These functions are crucial for maintaining cellular homeostasis.
Clarify misconceptions: Both rough and smooth ER are found in both plant and animal cells, and their functions are not limited to detoxification or calcium storage alone. Rough ER is not involved in lipid synthesis, and smooth ER is not involved in protein synthesis.