Free Cell Structure and Function MCQs with Answers
2,478 Cell Structure and Function MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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Read the Cell Structure and Function notesFree MDCAT chapter notes with key terms2,478 questions · page 124 of 124
- 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- A. 40S
- B. 60S
- C. 70S
- D. 80S
Explanation: 70S: This option is correct because prokaryotic cells have ribosomes made up of a small 30S subunit and a large 50S subunit, totaling 70S.
Correct answer: 70S- A. 1%
- B. 2%
- C. 3%
- D. 4%
Explanation: Bacterial cells are prokaryotic and lack the complex structures found in eukaryotic cells.
Correct answer: 1%2477. D.N.A of bacterium is:
- A. Haploid, single stranded, coiled
- B. Diploid, double stranded, coiled
- C. Haploid, double stranded, coiled
- D. Diploid, single stranded, coiled
Explanation: Bacterial DNA is characterized by being a single, circular, double stranded molecule that is tightly coiled to fit within the cell.
Correct answer: Haploid, double stranded, coiled- A. Cellulose
- B. Chitin
- C. Murein
- D. Pectin
Explanation: Option C is correct.The prokaryotic cell wall is composed of murein, also known as peptidoglycan.
Correct answer: Murein