Question

Choose the correct statements among the following
A) Sodium and potassium pumps in the cell utilise the ATP
B) For transport of polar molecules across membrane require carrier proteins
C) Secondary cell wall formed by addition of lignin material in the interfibrillar spaces of cellulose
D) Golgi complex, vacuole and peroxisomes constitute the Endomembrane system of cell

• A. B, C, D
• B. A, D, C
• C. A, B, D
• D. A, B, C

Hint:

Peroxisomes, Mitochondria, and Chloroplasts are NEVER part of the endomembrane system because their metabolic pathways are not functionally coordinated with the ER and Golgi.

Answer 1

The Correct Option is D

Step 1: Confirm the transport related statements.
The sodium potassium pump is a textbook active transporter that burns ATP to move ions against their gradient, so statement A holds. Polar, water loving molecules cannot slip through the fatty membrane on their own, they need carrier proteins to ferry them across, so statement B holds too.
Step 2: Confirm the cell wall statement.
As a cell wall matures, lignin gets deposited in the gaps between cellulose fibrils, hardening the wall into a secondary wall, so statement C is accurate as well.
Step 3: Test the endomembrane claim.
The endomembrane system is usually described as the ER, Golgi apparatus, lysosomes and vacuoles working together as one functional unit, peroxisomes are not included in that group since they do not originate from this same continuous membrane network, so statement D does not belong.
Final answer: Option 4, statements A, B and C are correct while D is the odd one out.