Question

Cell secretion is done by
A. Plastids
B. Endoplasmic reticulum
C. Golgi apparatus
D. Nucleolus

Answer 1

Hint: The movement of a substance from one point to another.

Complete answer:
Secretion is the production and release of a useful substance by a gland or cell. It is the movement and release of a chemical substance from one part to another.
Golgi apparatus has the main function of modifying, packaging, and storage of various cellular secretions. It packages materials which are formed in cells and transport them to the plasma membrane or lysosomes having digestive enzymes.
Golgi apparatus forms part of the cellular endomembrane system. The substance secreted by the cell can be any protein, steroid, or hormone which goes through the Golgi apparatus for its final production.

Additional information
1. Body tissues secrete a variety of substances that provide lubrication and moisture in addition to enzymes and hormones that facilitate and regulate complex biochemical processes.
2. The main method of cell secretion is through secretory portals at the cell plasma membrane called porosomes.
3. Golgi apparatus is an organelle in eukaryotic cells having a stack of flattened sac-like structures. It was discovered by Italian Physician Camilo Golgi in 1898.
4. In the Golgi apparatus, the vesicle is formed which fuses with the plasma membrane and the content is secreted.

So, the correct answer is the Golgi apparatus.
Note: Cell secretion depends upon hormones. It is mainly two types: via endocrine glands or exocrine glands. The cell secretion through exocrine glands is of three types: merocrine, holocrine, and apocrine secretion.