Florida Biology EOC Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Which organelle is covered with ribosomes?

Golgi apparatus

Mitochondria

Rough endoplasmic reticulum

The rough endoplasmic reticulum (Rough ER) is covered with ribosomes, making it appear bumpy or "rough" under a microscope. This is because ribosomes are responsible for protein synthesis, and the Rough ER is a site for protein production and modification. The Golgi apparatus (A) is responsible for sorting and packaging proteins, but does not contain ribosomes. Mitochondria (B) are the energy powerhouse of the cell and do not have ribosomes attached. The smooth endoplasmic reticulum (D) is involved in lipid synthesis and detoxification, and does not contain ribosomes. Therefore, the correct answer is C.

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Smooth endoplasmic reticulum

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