True regarding Golgi apparatus:
**Core Concept**
The Golgi apparatus is a complex organelle found in eukaryotic cells, playing a crucial role in protein modification, sorting, and packaging. It consists of flattened, membranous sacs called cisternae, stacked together to form a complex structure.
**Why the Correct Answer is Right**
The Golgi apparatus receives proteins synthesized by the endoplasmic reticulum (ER) and modifies them by adding carbohydrates, lipids, or other molecules. This process is called glycosylation, which helps in protein folding and stability. The modified proteins are then sorted and packaged into vesicles for transport to other parts of the cell or for secretion outside the cell.
**Why Each Wrong Option is Incorrect**
**Option A:** The Golgi apparatus is not directly involved in protein synthesis, which is the primary function of the ribosomes attached to the ER.
**Option B:** While the Golgi apparatus does interact with lysosomes, it is not responsible for lysosomal function or degradation of cellular waste.
**Option C:** The Golgi apparatus does not primarily regulate gene expression, which is a function of the nucleus.
**Clinical Pearl / High-Yield Fact**
The Golgi apparatus is a dynamic organelle that can reorganize and adapt to changing cellular needs, such as during cell growth or in response to environmental stress.
**Correct Answer:** None provided in the question.