Endomembrane System — NEET Biology MCQs with Solutions
Free NEET Biology Endomembrane System MCQs with step-by-step solutions (6 questions). Part of Cell: The Unit of Life. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Endomembrane System · easy · theory
The rough endoplasmic reticulum (RER) bears ribosomes and is chiefly the site of:
A. Photosynthesis
B. Protein synthesis (and secretion) ✓ Correct
C. Lipid synthesis only
D. ATP production
Solution: RER is studded with ribosomes and synthesises proteins for secretion/membranes; SER makes lipids/steroids.
Q2 — Endomembrane System · easy · theory
The Golgi apparatus is chiefly involved in:
A. DNA replication
B. Protein digestion in the cytosol
C. ATP synthesis
D. Packaging, modification and secretion of materials ✓ Correct
Solution: The Golgi modifies, sorts and packages proteins/lipids into vesicles, and forms lysosomes.
Q3 — Endomembrane System · medium · theory
Lysosomes are membrane-bound vesicles rich in ______ enzymes and are formed by the ______:
A. Digestive; nucleus
B. Photosynthetic; chloroplast
C. Hydrolytic; Golgi apparatus ✓ Correct
D. Oxidative; mitochondria
Solution: Lysosomes contain hydrolases (active at acidic pH) that digest carbohydrates, proteins, lipids and nucleic acids.
Q4 — Endomembrane System · medium · theory
In a plant cell the large central vacuole is bounded by a membrane called the ______ and helps maintain:
A. Thylakoid; nutrition
B. Cristae; osmosis
C. Tonoplast; turgidity ✓ Correct
D. Plasmalemma; rigidity
Solution: The tonoplast surrounds the vacuole; the sap inside maintains turgor pressure and stores substances.
Q5 — Endomembrane System · hard · theory
The endomembrane system EXCLUDES which of the following organelles because their functions are not coordinated with it?
A. Endoplasmic reticulum
B. Mitochondria, chloroplast and peroxisomes ✓ Correct
C. Lysosomes and vacuoles
D. Golgi apparatus
Solution: The endomembrane system = ER, Golgi, lysosomes, vacuoles; mitochondria, chloroplasts and peroxisomes are excluded.
Q6 — Endomembrane System · hard · theory
A protein destined for secretion typically follows the route:
A. Golgi → RER → mitochondria
B. Ribosome → mitochondria → outside
C. RER → Golgi (cis to trans) → secretory vesicle → plasma membrane ✓ Correct
D. SER → nucleus → lysosome
Solution: Secretory proteins are made on RER, modified/packaged in the Golgi (cis→trans), and released by exocytosis.