Cell Organelles MCQs Class 8 Science
Cell Organelles – MCQs with Answers & Explanations
Class: CBSE Class 8
Subject: Science
Section: Cell – Structure and Functions
Topic: Cell Organelles MCQs
Board: CBSE Board Examination (Based on NCERT Syllabus)
Subject: Science
Section: Cell – Structure and Functions
Topic: Cell Organelles MCQs
Board: CBSE Board Examination (Based on NCERT Syllabus)
1. Which organelle is called the powerhouse of the cell?
Answer: B. Mitochondria
Explanation: Mitochondria produce energy through cellular respiration, supplying ATP for cell activities.
Explanation: Mitochondria produce energy through cellular respiration, supplying ATP for cell activities.
2. Control center of the cell:
Answer: B. Nucleus
Explanation: The nucleus regulates growth, metabolism, and reproduction using genetic material.
Explanation: The nucleus regulates growth, metabolism, and reproduction using genetic material.
3. Protein synthesis occurs in:
Answer: A. Ribosomes
Explanation: Ribosomes assemble amino acids to form proteins.
Explanation: Ribosomes assemble amino acids to form proteins.
4. Organelle involved in packaging and transport:
Answer: A. Golgi apparatus
Explanation: It modifies, packages, and transports cell products.
Explanation: It modifies, packages, and transports cell products.
5. Digestive organelle of the cell:
Answer: B. Lysosome
Explanation: Lysosomes contain enzymes that digest wastes and cell debris.
Explanation: Lysosomes contain enzymes that digest wastes and cell debris.
6. Site of photosynthesis:
Answer: B. Chloroplast
Explanation: Chloroplasts contain chlorophyll for trapping sunlight.
Explanation: Chloroplasts contain chlorophyll for trapping sunlight.
7. Organelle storing water and wastes:
Answer: A. Vacuole
Explanation: Vacuoles maintain turgidity and store materials.
Explanation: Vacuoles maintain turgidity and store materials.
8. Plastids are present in:
Answer: B. Plant cells
Explanation: Plastids perform photosynthesis and storage.
Explanation: Plastids perform photosynthesis and storage.
9. Organelle absent in animal cells:
Answer: C. Chloroplast
Explanation: Animals do not perform photosynthesis.
Explanation: Animals do not perform photosynthesis.
10. Semi‑permeable boundary of organelles:
Answer: B. Membrane
Explanation: Membranes regulate entry and exit of substances.
Explanation: Membranes regulate entry and exit of substances.
11. Fluid matrix inside mitochondria:
Answer: B. Matrix
Explanation: Matrix contains enzymes for respiration.
Explanation: Matrix contains enzymes for respiration.
12. Flattened sacs in Golgi body:
Answer: B. Cisternae
Explanation: They help in packaging substances.
Explanation: They help in packaging substances.
13. Organelle for lipid synthesis:
Answer: A. Smooth ER
Explanation: Smooth ER synthesizes lipids and detoxifies chemicals.
Explanation: Smooth ER synthesizes lipids and detoxifies chemicals.
14. Ribosomes on ER make it:
Answer: B. Rough
Explanation: Ribosomes give rough appearance.
Explanation: Ribosomes give rough appearance.
15. Organelle storing starch:
Answer: C. Leucoplast
Explanation: Leucoplasts store starch, oils, proteins.
Explanation: Leucoplasts store starch, oils, proteins.
16. Internal membrane folds of mitochondria:
Answer: B. Cristae
Explanation: Cristae increase surface area for respiration.
Explanation: Cristae increase surface area for respiration.
17. Green pigment in chloroplast:
Answer: B. Chlorophyll
Explanation: It absorbs sunlight energy.
Explanation: It absorbs sunlight energy.
18. Organelle helping detoxification:
Answer: A. Smooth ER
Explanation: It detoxifies drugs and poisons.
Explanation: It detoxifies drugs and poisons.
19. Stack of thylakoids:
Answer: A. Grana
Explanation: Grana are stacks where light reaction occurs.
Explanation: Grana are stacks where light reaction occurs.
20. Organelle common in plant & animal cells:
Answer: C. Mitochondria
Explanation: Both need energy for metabolism.
Explanation: Both need energy for metabolism.
