Free Cytoplasmic Organelles MCQs with Answers
158 Cytoplasmic Organelles MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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- A. Glyoxisome
- B. Bile juice
- C. Pancreatic juice
- D. Lysosomes
Explanation: Glyoxisomes are specialized organelles found in plant cells and some microorganisms.
Correct answer: Glyoxisome- A. Enzymes
- B. Protein
- C. Sugar
- D. Lipids
Explanation: The smooth endoplasmic reticulum (SER) is primarily responsible for the synthesis of lipids, which include phospholipids, cholesterol, and…
Correct answer: Lipids- A. Golgi-Apparatus
- B. Lysosomes
- C. Peroxisomes
- D. Glyoxisomes
Explanation: Lysosomes perform phagocytosis, pinocutosis and autophagy as they contain enzymes to digest foreign material and casue cell death.
Correct answer: Lysosomes- A. Stroma
- B. Grana
- C. Thylakoid membrane
- D. Crista
Explanation: The correct answer is the thylakoid membrane. This is where the pigments chlorophyll a, b, and carotenoids are located, as they are…
Correct answer: Thylakoid membrane- A. Leaf veins
- B. Cristae
- C. Capillaries
- D. Brush border
Explanation: Microvilli are small, finger-like projections on the surface of epithelial cells, especially in the small intestine, where they are known…
Correct answer: Brush border- A. Paramylum
- B. Amyloplasts
- C. Leucoplasts
- D. Glycoplasts
Explanation: The correct answer is Amyloplasts. These are specialized plastids within plant cells that synthesize and store starch granules.
Correct answer: Amyloplasts- A. 1-2 µm
- B. 2-4 µm
- C. 4-6 µm
- D. 6-8 µm
Explanation: Chloroplasts are a type of plastid. They are chlorophyll-containing organelles within the cells of plants and green algae that are the…
Correct answer: 4-6 µm- A. Higher plant cells
- B. Lower plant cells
- C. Animals cells
- D. Both (B) &(C)
Explanation: Only lower plant cells and animal cells have centrioles at right angle to each other so correct option is D
Correct answer: Both (B) &(C)- A. Microfilament and inter mediate filaments
- B. Microfilaments and microtubules
- C. Inter mediate filaments and micro tubules
- D. Only microfilaments
Explanation: The functional roles for microfilaments involve cell membrane motility, endo- and exocytosis, secretion and vesicle transfer so option…
Correct answer: Inter mediate filaments and micro tubules- A. Thylakoids are assembled into stacks
- B. Thylakoids exist as a maze of folded membranes.
- C. The space surrounding thylakoids is called stroma.
- D. Thylakoids contain chlorophyll.
Explanation: Thylakoids are stacks of granum, they are surrounded by stroma that is the colorless fluid surrounding the grana within the chloroplast.
Correct answer: Thylakoids exist as a maze of folded membranes.- A. Nucleus
- B. Ribosomes
- C. Lysosome
- D. Plastids
Explanation: The Golgi apparatus, also known as Golgi bodies, plays a crucial role in modifying, sorting, and packaging proteins and lipids for…
Correct answer: Lysosome- A. 70S unit
- B. 80S unit
- C. 90S unit
- D. 100S unit
Explanation: The correct answer is the 80S unit, which is formed by the assembly of the 40S and 60S ribosomal subunits in eukaryotic cells.
Correct answer: 80S unit- A. Endoplasmic reticulum
- B. Golgi bodies
- C. Mitochondria
- D. Vacoule
Explanation: Option C is correct.Mitochondria are regarded as self-replicating organelles.
Correct answer: Mitochondria- A. Ribosomes
- B. Golgi bodies
- C. Mitochondria
- D. Endoplasmic reticulum
Explanation: Option D is correct.Lipid synthesis occurs in the endoplasmic reticulum (ER) of the cell.
Correct answer: Endoplasmic reticulum- A. Cell organelle only
- B. Insoluble waste only
- C. Storage products only
- D. Cell organelle, insoluble waste and storage products
Explanation: The cytoplasm contains cell organelles, insoluble waste, and storage products.
Correct answer: Cell organelle, insoluble waste and storage products- A. Cell membrane
- B. Nucleus
- C. Lysosomes
- D. Vacuole
Explanation: Option C is correct.Tay-Sach's disease particularly results from the malfunctioning of lysosomes.
Correct answer: Lysosomes- A. Muscle cells
- B. Cardiac cells
- C. Mature RBC's
- D. WBC's
Explanation: Option C is correct.Mitochondria are usually absent in mature RBC's. Mature RBC's, or erythrocytes, are the most abundant type of blood…
Correct answer: Mature RBC's- A. Amylase
- B. Lysosomal
- C. Lyase
- D. Lipase
Explanation: Storage diseases, also known as lysosomal storage diseases, are a group of genetic disorders caused by defects (mutations) in lysosomal…
Correct answer: Lysosomal