Endomembrane System: Which Organelles Are Included?
Biology · Cell: The Unit of Life · NEET
The endomembrane system includes only four organelles: the endoplasmic reticulum (ER), Golgi complex, lysosomes and vacuoles. They are grouped together because their work is coordinated. Mitochondria, chloroplasts and peroxisomes are NOT part of it, because their functions are not coordinated with these four. Memory hook: "ELGV" = ER, Lysosome, Golgi, Vacuole — the 4 team members.
The endomembrane system has 4 coordinated organelles (ER, Golgi, lysosomes, vacuoles). Mitochondria, chloroplasts and peroxisomes are excluded because their functions are not coordinated.
Your doubts, answered
Which organelles are included in the endomembrane system?
Exactly four: endoplasmic reticulum (ER), Golgi complex, lysosomes and vacuoles. NCERT lists these four and no others. Learn the set 'ELGV' so you do not add extras in the exam.
Why are mitochondria and chloroplasts NOT part of the endomembrane system?
NCERT gives one clear reason: the functions of mitochondria, chloroplasts and peroxisomes are not coordinated with the four endomembrane organelles. So even though they have membranes, they are kept out. This exact reason is tested in NEET, so remember 'functions not coordinated'.
Are ribosomes part of the endomembrane system?
No. Ribosomes are non-membrane-bound organelles (they have no membrane at all). The endomembrane system is only about membrane-bound organelles whose work is linked. If an option lists ribosomes, that option is wrong.
Is the peroxisome part of the endomembrane system?
No. Peroxisome is a microbody with a single membrane, but its functions are not coordinated with ER, Golgi, lysosomes and vacuoles, so NCERT excludes it. NEET 2023 tested exactly this point.
How many organelles are in the endomembrane system?
Four organelles: ER, Golgi complex, lysosomes and vacuoles. If you count 'more than four', you have added an excluded organelle like mitochondria or peroxisome by mistake.
⚠️ The NEET trap ✗ Any membrane-bound organelle is part of the endomembrane system, so mitochondria and chloroplasts are included. ✓ Only ER, Golgi complex, lysosomes and vacuoles are included. Mitochondria, chloroplasts and peroxisomes are excluded because their functions are not coordinated with these four. 🧠 Having a membrane is not enough — the test is 'coordinated function'. Only 4 organelles pass: ELGV.
Real NEET questions
2021
The organelles that are included in the endomembrane system are
A · Golgi complex, Mitochondria, Ribosomes and Lysosomes
B · Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes
C · Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes
D · Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles ✓
Solution: The endomembrane system has exactly four members: ER, Golgi complex, lysosomes and vacuoles. Options A, B and C wrongly include mitochondria or ribosomes, which are not part of the system. Only option (d) lists the correct four.
2023
Which of the following are NOT considered as the part of endomembrane system? A. Mitochondria B. Endoplasmic Reticulum C. Chloroplasts D. Golgi complex E. Peroxisomes
A · B and D only
B · A, C and E only ✓
C · A and D only
D · A, D and E only
Solution: ER (B) and Golgi complex (D) ARE part of the endomembrane system. Mitochondria (A), chloroplasts (C) and peroxisomes (E) are NOT, because their functions are not coordinated with the four endomembrane organelles. So the excluded ones are A, C and E — option (b).
2026
Endomembrane system includes _______.
A · endoplasmic reticulum, Golgi complex, lysosomes and vacuole ✓
B · endoplasmic reticulum, chloroplast, peroxisomes and vacuole
C · mitochondria, chloroplast, peroxisomes and vacuole
D · Golgi complex, chloroplast, peroxisomes and vacuole
Solution: The correct set is ER, Golgi complex, lysosomes and vacuoles. Every other option adds an excluded organelle (chloroplast, peroxisome or mitochondria), so option (a) is the only fully correct answer.
Solved Cell: The Unit of Life NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
It is a group of membrane-bound organelles inside a eukaryotic cell whose functions are linked and coordinated. The group has four members: ER, Golgi complex, lysosomes and vacuoles.
Is the plasma membrane part of the endomembrane system?
NCERT does not list the plasma membrane among the four endomembrane organelles. For NEET, stick to the four NCERT members: ER, Golgi, lysosomes and vacuoles.
Why is the endomembrane system important for NEET?
It is a direct, high-repeat question. NEET has asked 'which organelles are included' and 'which are NOT included' many times (2021, 2023, 2026). Learning the exact four and the exclusion rule gives you an easy, sure mark.
What is the easy trick to remember the endomembrane organelles?
Use 'ELGV' = Endoplasmic reticulum, Lysosome, Golgi complex, Vacuole. If an organelle is not in ELGV, it is excluded.
