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 10 of 124
- A. Psilopsida
- B. Lycopsida
- C. Sphenopsida
- D. Pteropsida
Explanation: Ferns are classified under Pteropsida, the group of vascular plants with fronds and spore-producing structures.
Correct answer: Pteropsida- A. Sporophyte
- B. Gametophyte
- C. Both of these
- D. None of these
Explanation: Antheridia and archegonia are the male and female sex organs of bryophytes, and they develop on the haploid gametophyte generation.
Correct answer: Gametophyte- A. All are eukaryotes
- B. They are multicellular.
- C. Non-motile organisms
- D. They Are heterotrophes
Explanation: Plants are eukaryotic, multicellular and generally non-motile organisms, and most make organic food by photosynthesis, so they are…
Correct answer: They Are heterotrophes- A. Coelenterates
- B. Platyhelminthes
- C. Aschelminthes
- D. Annelids
Explanation: Aschelminthes, including nematodes, are pseudocoelomates because their body cavity is derived from the persistent blastocoel and is not…
Correct answer: Aschelminthes- A. Dugesia
- B. Fasciola
- C. Taenia
- D. None of these
Explanation: Dugesia is a free-living planarian that belongs to Platyhelminthes, whereas Fasciola and Taenia are parasitic flatworms.
Correct answer: Dugesia- A. 0.2 mm
- B. 0.2 nm
- C. 0.2 m
- D. none of these
Explanation: An electron microscope uses electrons with much shorter wavelengths than visible light, giving a resolving power of about 0.2 nm.
Correct answer: 0.2 nm- A. Excretory system
- B. Digestive system
- C. Criculatory system
- D. Nervous system
Explanation: Annelid segmentation is reflected in the arrangement of their circulatory vessels and repeated connecting vessels across body segments.
Correct answer: Criculatory system- A. Sac - like digestive system
- B. Tube - like digestive system
- C. Circulatory system
- D. Respiratory system
Explanation: Nematodes possess a complete, tube-like digestive system with a mouth, intestine and anus, allowing food to move in one direction.
Correct answer: Tube - like digestive system- A. Rhabditis
- B. Enterobius vermicularis
- C. Ancylostoma duodenale
- D. Taenia solium
Explanation: Enterobius vermicularis is the pinworm, also called the threadworm, and commonly infects the human intestine.
Correct answer: Enterobius vermicularis- A. Crustacea
- B. Insecta
- C. Arachnida
- D. Myriapoda
Explanation: Arachnids generally develop directly, so the young resemble small adults and there is no true larval-to-adult metamorphosis.
Correct answer: Arachnida- A. Echinoderms
- B. Hemichordates
- C. Vertebrates
- D. Chordates
Explanation: Hemichordates are called prechordates because they show some chordate-like features but are considered an evolutionary group preceding…
Correct answer: Hemichordates- A. Head
- B. Ventral muscular foot
- C. Dorsal visceral region
- D. All of these
Explanation: The molluscan mantle is a dorsal fold of the body wall that covers the visceral mass and usually forms the mantle cavity.
Correct answer: Dorsal visceral region- A. Nematods
- B. Arthropods
- C. Molluscs
- D. None of these
Explanation: Arthropods and annelids are traditionally considered to share a common segmented ancestor, since both show metamerism and similar…
Correct answer: Arthropods- A. Tentacles
- B. Palps
- C. Eyes
- D. All of these
Explanation: Polychaetes possess sensory and feeding structures such as tentacles and palps, and many species also have eyes.
Correct answer: All of these- A. Ventral nerve cord
- B. Dorsal nerve cord
- C. Lateral nerve cord
- D. All of these
Explanation: The nematode nervous system includes a nerve ring and longitudinal dorsal, ventral and lateral nerve cords, so all three listed cords are…
Correct answer: All of these- A. Flatwarms
- B. Triploblastic
- C. Coelomate
- D. Bilateral symmetry
Explanation: Platyhelminthes are triploblastic, bilaterally symmetrical flatworms, but they are acoelomate rather than coelomate because the space…
Correct answer: Coelomate- A. Calcium
- B. Silica
- C. Chitin
- D. Both A & B
Explanation: The hard exoskeleton of reef-building corals, which are coelenterates, is mainly calcium carbonate deposited by the animals.
Correct answer: Calcium- A. Blastopore
- B. Plastoquinone
- C. Blastocoel
- D. Splitting of mesoderm
Explanation: A pseudocoel is formed when the embryonic blastocoel persists as the body cavity, with mesoderm lining the organs but not completely…
Correct answer: Blastocoel- A. Nephridia
- B. Flame cells
- C. Malpighian tubules
- D. Nephrons
Explanation: Flatworms remove excess water and wastes through protonephridia containing flame cells, whose beating cilia drive fluid through tubules.
Correct answer: Flame cells- A. Hydra
- B. Obelia
- C. Aurelia
- D. None of these
Explanation: Hydra remains in the polyp form and reproduces asexually by budding, so it does not show alternation between polyp and medusa generations.
Correct answer: Hydra