1 Which organelle is involved in the breakdown of fatty acids and detoxification? A Smooth ER B Rough ER C Lysosome D Peroxisome
2 Which cytoskeletal element is the thinnest? A Microtubules B Microfilaments C Intermediate filaments D Cilia
3 Which organelle contains digestive enzymes to break down waste? A Lysosome B Ribosome C Golgi apparatus D Mitochondrion
4 Which organelle is known as the powerhouse of the cell? A Nucleus B Mitochondrion C Ribosome D Golgi apparatus
5 What is the main function of the nucleolus? A Producing ribosomes B Storing water C Generating ATP D Packaging proteins
6 What is the jelly-like substance inside the nucleus called? A Cytosol B Nucleoplasm C Matrix D Stroma
7 The fluid-mosaic model describes the structure of which cell part? A Cell wall B Cell membrane C Cytoplasm D Nucleus
8 What is the primary role of stem cells? A To fight infections B To differentiate into specialized cells C To produce energy D To store water
9 Which of these is a function of the cell membrane? A To provide rigid support B To control movement of substances in and out of the cell C To synthesize proteins D To store genetic material
10 Which of the following is a characteristic of stem cells? A They are fully differentiated. B They cannot divide. C They can differentiate into various cell types. D They are only found in plants.
11 What are lysosomes known as? A Powerhouse of the cell B Suicide bags of the cell C Protein factories D Control center
12 Which of the following is a function of the Golgi apparatus? A Modifying, sorting, and packaging proteins B Generating ATP C Detoxifying harmful substances D Storing genetic information
14 Which type of endoplasmic reticulum has ribosomes attached to its surface? A Smooth ER B Rough ER C Golgi apparatus D Lysosome
15 What is the function of the large central vacuole in plant cells? A To make proteins B To store water and maintain turgor pressure C To produce energy D To control cell division
16 Which structure is made of microtubules and helps in cell division? A Centriole B Cilium C Flagellum D Ribosome
17 Which type of plastid gives colour to flowers and fruits? A Chloroplast B Leucoplast C Chromoplast D Ribosome
18 What is the main function of the cell wall in plant cells? A To control cell activities B To provide rigidity and support C To synthesize proteins D To store water
19 What is the role of the nucleolus? A To store DNA B To produce ribosomes C To control cell division D To synthesize lipids
20 Which part of the plant cell is made of cellulose? A Cell membrane B Cell wall C Chloroplast D Nucleus
21 Which of these is found in plant cells but not in animal cells? A Mitochondrion B Ribosome C Chloroplast D Nucleus
22 The large central vacuole in plant cells helps to maintain: A Turgor pressure B Protein synthesis C Cell division D DNA replication
23 Which of the following is a function of the cytoskeleton? A Provides shape and support to the cell B Produces energy C Stores water D Synthesizes proteins
24 Which animal cell is specialized for carrying oxygen? A Muscle cell B Neuron C Red blood cell D Liver cell
25 Which of these is a specialized animal cell? A Mesophyll cell B Guard cell C Neuron D Root hair cell