31. Which organelle is involved in cell division?
A) Ribosome
B) Centrosome
C) Vacuole
D) Golgi
Answer: B) Centrosome
Which structure gives shape to the cell?
A) Cytoplasm
B) Cytoskeleton
C) Nucleus
D) Ribosome
Answer: B) Cytoskeleton
Plasmolysis occurs in:
A) Animal cells
B) Plant cells
C) Bacteria
D) Fungi
Answer: B) Plant cells
Diffusion is movement from:
A) Low to high concentration
B) High to low concentration
C) Equal concentration
D) None
Answer: B) High to low concentration
Osmosis involves movement of:
A) Solute
B) Water
C) Protein
D) Lipid
Answer: B) Water
The nucleolus produces:
A) DNA
B) Ribosomes
C) Proteins
D) Lipids
Answer: B) Ribosomes
Which organelle has double membrane?
A) Ribosome
B) Mitochondria
C) Lysosome
D) Vacuole
Answer: B) Mitochondria
Cell membrane is:
A) Fully permeable
B) Semi-permeable
C) Impermeable
D) Rigid
Answer: B) Semi-permeable
The fluid mosaic model describes:
A) Cytoplasm
B) Cell membrane
C) Nucleus
D) Vacuole
Answer: B) Cell membrane
Which cell part contains enzymes?
A) Lysosome
B) Ribosome
C) Nucleus
D) Golgi
Answer: A) Lysosome
DNA is located in:
A) Cytoplasm
B) Nucleus
C) Ribosome
D) Vacuole
Answer: B) Nucleus
Which organelle stores calcium?
A) ER
B) Lysosome
C) Ribosome
D) Nucleus
Answer: A) ER
Which cell lacks organelles?
A) Eukaryotic
B) Prokaryotic
C) Plant
D) Animal
Answer: B) Prokaryotic
Chloroplast is absent in:
A) Plants
B) Animals
C) Algae
D) Bacteria
Answer: B) Animals
Which structure supports plant cells?
A) Cell wall
B) Membrane
C) Nucleus
D) Ribosome
Answer: A) Cell wall
Which organelle stores food?
A) Vacuole
B) Ribosome
C) Lysosome
D) Nucleus
Answer: A) Vacuole
Which cell organelle is smallest?
A) Ribosome
B) Nucleus
C) Mitochondria
D) Golgi
Answer: A) Ribosome
Which organelle processes proteins?
A) Golgi apparatus
B) Ribosome
C) Lysosome
D) Vacuole
Answer: A) Golgi apparatus
Which organelle is involved in respiration?
A) Mitochondria
B) Ribosome
C) Nucleus
D) Vacuole
Answer: A) Mitochondria
Which part protects the cell?
A) Membrane
B) Nucleus
C) Cytoplasm
D) Ribosome
Answer: A) Membrane
Part 2: MCQs 51–100
Which organelle synthesizes lipids?
A) Smooth ER
B) Rough ER
C) Ribosome
D) Nucleus
Answer: A) Smooth ER
Which cell organelle contains chlorophyll pigment?
A) Mitochondria
B) Chloroplast
C) Ribosome
D) Lysosome
Answer: B) Chloroplast
The function of nucleus is:
A) Respiration
B) Control activities
C) Digestion
D) Storage
Answer: B) Control activities
Which organelle is absent in bacteria?
A) Ribosome
B) Nucleus
C) Cytoplasm
D) Cell membrane
Answer: B) Nucleus
The site of ATP synthesis is:
A) Nucleus
B) Mitochondria
C) Golgi
D) Vacuole
Answer: B) Mitochondria
Which organelle is called suicidal bag?
A) Lysosome
B) Ribosome
C) Golgi
D) Vacuole
Answer: A) Lysosome
Chromatin is made of:
A) DNA and protein
B) Lipids
C) Carbohydrates
D) RNA
Answer: A) DNA and protein
Which structure gives rigidity to plants?
A) Membrane
B) Cell wall
C) Cytoplasm
D) Nucleus
Answer: B) Cell wall
Which organelle stores water?
A) Vacuole
B) Ribosome
C) Nucleus
D) ER
Answer: A) Vacuole
Which cell is larger?
A) Prokaryotic
B) Eukaryotic
C) Both equal
D) None
Answer: B) Eukaryotic
Which organelle contains digestive enzymes?
A) Lysosome
B) Ribosome
C) Golgi
D) Nucleus
Answer: A) Lysosome
Which organelle modifies lipids?
A) Golgi
B) Ribosome
C) Nucleus
D) Vacuole
Answer: A) Golgi
Which structure maintains cell shape?
A) Cytoskeleton
B) Nucleus
C) Ribosome
D) Vacuole
Answer: A) Cytoskeleton
Which organelle contains cristae?
A) Mitochondria
B) Ribosome
C) Lysosome
D) Golgi
Answer: A) Mitochondria
Which organelle has thylakoids?
A) Chloroplast
B) Mitochondria
C) Ribosome
D) Nucleus
Answer: A) Chloroplast
The main function of ribosome is:
A) Respiration
B) Protein synthesis
C) Digestion
D) Storage
Answer: B) Protein synthesis
Which organelle is present only in plant cells?
A) Chloroplast
B) Mitochondria
C) Ribosome
D) Lysosome
Answer: A) Chloroplast
Which cell lacks cell wall?
A) Plant
B) Animal
C) Bacteria
D) Fungi
Answer: B) Animal
Which organelle transports proteins?
A) ER
B) Nucleus
C) Vacuole
D) Lysosome
Answer: A) ER
The site of lipid metabolism is:
A) Smooth ER
B) Ribosome
C) Nucleus
D) Golgi
Answer: A) Smooth ER
Which organelle is involved in secretion?
A) Golgi
B) Ribosome
C) Nucleus
D) Vacuole
Answer: A) Golgi
Which cell part is selectively permeable?
A) Cell membrane
B) Cell wall
C) Cytoplasm
D) Nucleus
Answer: A) Cell membrane
Which organelle helps detoxify drugs?
A) Smooth ER
B) Ribosome
C) Nucleus
D) Vacuole
Answer: A) Smooth ER
Which organelle is absent in RBCs?
A) Nucleus
B) Cytoplasm
C) Membrane
D) Protein
Answer: A) Nucleus
The inner membrane of mitochondria forms:
A) Cristae
B) Thylakoid
C) Ribosome
D) Vacuole
Answer: A) Cristae
Which structure is found in both plant and animal cells?
A) Mitochondria
B) Cell wall
C) Chloroplast
D) Plasmid
Answer: A) Mitochondria
Which organelle is largest?
A) Nucleus
B) Ribosome
C) Lysosome
D) Vacuole
Answer: A) Nucleus
Which organelle controls metabolism?
A) Nucleus
B) Ribosome
C) Vacuole
D) Lysosome
Answer: A) Nucleus
Which structure stores genetic information?
A) DNA
B) Lipid
C) Protein
D) Enzyme
Answer: A) DNA
Which organelle has its own DNA?
A) Mitochondria
B) Ribosome
C) Golgi
D) Lysosome
Answer: A) Mitochondria
Which organelle forms vesicles?
A) Golgi
B) Ribosome
C) Nucleus
D) ER
Answer: A) Golgi
Which organelle is involved in intracellular transport?
A) ER
B) Ribosome
C) Lysosome
D) Vacuole
Answer: A) ER
Which organelle breaks down old organelles?
A) Lysosome
B) Ribosome
C) Golgi
D) Nucleus
Answer: A) Lysosome
Which organelle produces RNA?
A) Nucleolus
B) Ribosome
C) Lysosome
D) Golgi
Answer: A) Nucleolus
Which cell structure is rigid?
A) Cell wall
B) Membrane
C) Cytoplasm
D) Nucleus
Answer: A) Cell wall
Which organelle stores waste?
A) Vacuole
B) Ribosome
C) Lysosome
D) Nucleus
Answer: A) Vacuole
Which organelle has enzymes for metabolism?
A) Mitochondria
B) Ribosome
C) Vacuole
D) Nucleus
Answer: A) Mitochondria
Which organelle is absent in prokaryotes?
A) Ribosome
B) Membrane
C) Nucleus
D) Cytoplasm
Answer: C) Nucleus
Which structure surrounds cytoplasm?
A) Membrane
B) Nucleus
C) Ribosome
D) Vacuole
Answer: A) Membrane
Which organelle is involved in energy conversion?
A) Mitochondria
B) Ribosome
C) Lysosome
D) Golgi
Answer: A) Mitochondria
Which organelle is double-membraned?
A) Nucleus
B) Ribosome
C) Lysosome
D) Vacuole
Answer: A) Nucleus
Which organelle is absent in plant cells?
A) Centrosome
B) Chloroplast
C) Vacuole
D) Cell wall
Answer: A) Centrosome
Which structure is flexible?
A) Cell membrane
B) Cell wall
C) Cytoskeleton
D) Nucleus
Answer: A) Cell membrane
Which organelle produces secretory proteins?
A) Rough ER
B) Smooth ER
C) Lysosome
D) Vacuole
Answer: A) Rough ER
Which organelle is responsible for packaging?
A) Golgi
B) Ribosome
C) Nucleus
D) Vacuole
Answer: A) Golgi
Which organelle is important for photosynthesis?
A) Chloroplast
B) Mitochondria
C) Ribosome
D) Lysosome
Answer: A) Chloroplast
Which organelle stores pigments?
A) Vacuole
B) Ribosome
C) Lysosome
D) Golgi
Answer: A) Vacuole
Which organelle is involved in transport of lipids?
A) Smooth ER
B) Ribosome
C) Nucleus
D) Vacuole
Answer: A) Smooth ER
Which organelle produces energy-rich molecules?
A) Mitochondria
B) Ribosome
C) Lysosome
D) Golgi
Answer: A) Mitochondria
50. Which organelle is essential for cell survival?
A) Nucleus
B) Ribosome
C) Membrane
D) All of these
Answer: D) All of these