Read the statements given below about the functions performed by the Golgi apparatus:
- I. It transports and chemically modifies the material contained within it.
- II. It secretes mucin in the respiratory tract.
- III. It secretes slime in insectivorous plants.
Which of the following is the correct answer?
- AI is wrong, but II and III are correct
- BII is wrong, but I and III are correct
- CII and III are wrong, but I is correct
- DAll are correct
Show answer and explanation
Correct answer: (d) All are correct
Explanation
All three statements are correct. The Golgi apparatus receives proteins and lipids from the endoplasmic reticulum, modifies them (for example, by adding sugars to make glycoproteins), packs them into vesicles and sends them to where they are needed. So it is central to secretion:
- I: it transports and chemically modifies the materials it receives;
- II: in the goblet cells of the respiratory and digestive tracts, it makes and secretes mucin, which forms mucus;
- III: in insectivorous plants such as sundew, the Golgi of the gland cells secretes the sticky slime (mucilage) that traps insects.