Free Animal and Plant Cell MCQs with Answers
275 Animal and Plant Cell 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 and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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275 questions · page 6 of 14
- A. plant
- B. bacterial
- C. fungal
- D. all the above
Explanation: Plant, bacterial, and fungal cells generally possess a rigid cell wall outside the plasma membrane, although their wall materials differ.
Correct answer: all the above- A. cytodplasm
- B. vacuoles
- C. mitochondria
- D. nucleus
Explanation: In ordinary cell division, nuclear division, called karyokinesis, occurs before cytoplasmic division, called cytokinesis, so the nucleus…
Correct answer: nucleus- A. Mycoxanthin, mucoxanthin and myxoxanthophylls
- B. Alpha and beta carotenes and myxoxanthin
- C. Fucoxanthin, diatoxanthin, diadinoxanthin
- D. None of the above
Explanation: Diatoms have golden-brown colour because their plastids contain accessory xanthophyll pigments, especially fucoxanthin, along with…
Correct answer: Fucoxanthin, diatoxanthin, diadinoxanthin- A. Valve
- B. Raphe
- C. Pseudopodium
- D. Cilia or flagella
Explanation: Many diatoms move by secreting mucilage through a longitudinal slit called the raphe; the mucilage provides the traction for gliding.
Correct answer: Raphe- A. Fertilizers
- B. Weedicides
- C. Insecticides
- D. Fire proof bricks
Explanation: Diatomaceous earth consists of the accumulated silica shells of diatoms and can withstand high temperatures, so it is used in insulation…
Correct answer: Fire proof bricks- A. Flagella
- B. Stored lpids
- C. Pseudopodia
- D. All of these
Explanation: Diatoms remain suspended more easily because they store lipids, which are less dense than water and reduce their sinking rate.
Correct answer: Stored lpids- A. Diatoms
- B. Slime moulds
- C. Chlorophycean forms
- D. None of the these
Explanation: Diatom cells commonly contain oil bodies that act as reserve food and also help reduce density, supporting flotation.
Correct answer: Diatoms- A. Chloryphyllpigments
- B. Enzymes for photolysis
- C. Defined grana and stroma
- D. Carotenes with chlorophylls
Explanation: Diatom and chrysophycean chloroplasts have a distinctive internal organization and do not show the clearly defined grana and stroma…
Correct answer: Defined grana and stroma- A. Silica
- B. Calcium carbonate
- C. Manesium carbonate
- D. Both B. and C.
Explanation: A diatom frustule is a rigid shell made mainly of hydrated silica, forming the two overlapping halves of the cell wall.
Correct answer: Silica- A. Raphe
- B. Valves
- C. Frustule
- D. Girdles
Explanation: A diatom’s rigid silica cell wall is called a frustule, and after the cell contents disappear, the empty frustule remains.
Correct answer: Frustule- A. Diatoms
- B. Dinoflagellates
- C. Slime moulds
- D. None of these
Explanation: Diatom cell walls contain hydrated silica, which resists decomposition and can remain preserved as a fossil.
Correct answer: Diatoms- A. Nonliving cells
- B. Siliceous wall
- C. Mucilaginous wall
- D. Water proof cell
Explanation: The siliceous wall of a diatom is resistant to decay, so empty frustules can accumulate after the organic cell material decomposes.
Correct answer: Siliceous wall- A. Diatoms
- B. Desmids
- C. Pyrrophyta
- D. Chlorophyta
Explanation: Diatoms have a frustule made of two overlapping silica halves: the larger epitheca and the smaller hypotheca.
Correct answer: Diatoms- A. Rhodophyta
- B. Phaeophyta
- C. Baciliariophyta
- D. Euglenophyta
Explanation: Bacillariophyta, the diatom group, has cell walls richly impregnated with silica, forming durable frustules.
Correct answer: Baciliariophyta- A. Diatioms
- B. Heliozoans
- C. Radiolarians
- D. Foraminiferans
Explanation: Diatom frustules are siliceous and resist decay, allowing them to become abundant microfossils in sedimentary and petroleum-associated…
Correct answer: Diatioms- A. Diplaneis
- B. Coscinodiscus
- C. Camphyloneiscus
- D. Stephanodis
Explanation: Coscinodiscus is a well-known centric diatom with a circular or discoid frustule.
Correct answer: Coscinodiscus- A. Phytoplanktonic population
- B. Freshwater lakes and ponds
- C. Marine environment
- D. All of the above
Explanation: Diatoms occur as major members of phytoplankton and live in both freshwater habitats such as lakes and ponds and marine environments.
Correct answer: All of the above- A. Pinnularia, Navicula, Cymbella, Melosira
- B. Euglenamorpha, Hedneria , Heteronema, Colacium
- C. Nostoc, Anabaena, Aulosira, Cylindrospermum
- D. Cochlodinium, Gymnodinium, Lenodinium, Peridinium
Explanation: Pinnularia, Navicula, Cymbella and Melosira are all recognised diatom genera.
Correct answer: Pinnularia, Navicula, Cymbella, Melosira- A. Chrysophyta
- B. Bacillariophyceae
- C. Xanthophyceae
- D. Both A. and B.
Explanation: Diatoms have traditionally been placed within Chrysophyta and are more specifically classified in Bacillariophyceae, so both descriptions…
Correct answer: Both A. and B.- A. Diatoms
- B. Radiolarians
- C. Dinoflagellates
- D. Foraminiferans
Explanation: Diatoms are called the “pastures of the sea” because they are abundant photosynthetic producers that form the base of many marine food…
Correct answer: Diatoms