What is the structural relationship between the cis (forming) face and the trans (maturing) face of a Golgi apparatus?
Answer and explanation
Correct answer: C. The cis face is convex and oriented toward the ER; the trans face is concave and oriented toward the plasma membrane
- Step 1: The Golgi apparatus is highly polarized, with distinct architectural faces.
- Step 2: The cis face (forming face) is convex and positioned closest to the rough endoplasmic reticulum, receiving transport vesicles.
- Step 3: The trans face (maturing face) is concave and directed towards the plasma membrane, budding off mature secretory vesicles and lysosomes.
Answer
The cis face is convex and oriented toward the ER; the trans face is concave and oriented toward the plasma membrane.
Why not the others: The option saying the cis face is concave and faces the plasma membrane completely reverses the convexity and spatial orientation of the two faces; Both faces identical contradicts the pronounced structural and biochemical polarity of the Golgi; Releasing secretory granules from cis reverses the functional flow of vesicular transport.
Practise more Cell Structure and Function.
Free questions with an explanation for every one, and full timed NEET UG mock tests.
More Cell Structure and Function questions
- Which of the following cellular organelles is enclosed by a single unit membrane and is rich in hydrolytic acid hydrolases?
- According to the fluid mosaic model proposed by Singer and Nicolson (1972), what is the primary state and arrangement of the lipid bilayer?
- Which component of the bacterial cell envelope determines cell shape and prevents the bacterium from bursting or collapsing in a hypotonic m…
- What is the structural organization of microtubules in the eukaryotic cilia and flagella axoneme?
- Which of the following organelles is directly involved in the synthesis of lipids, phospholipids, and steroid hormones in animal cells?
- In eukaryotic plant cells, what is the composition of the middle lamella that cements adjacent cell walls together?