What organism makes a cell plate during cytokinesis?

Question

What organism makes a cell plate during cytokinesis??  
A. Bacterium  
B. Human  
C. Mushroom  
D. Plant

Accepted Answer

Correct Answer: (D)Plant. 
Rationale: The formation of a cell plate from fusing vesicles is the distinctive mechanism of cytokinesis in plant cells, allowing them to divide while maintaining their rigid cell wall.Plant cells possess a rigid cellulose cell wall that prevents the inward pinching of a cleavage furrow. During telophase, Golgi-derived vesicles carrying cell wall precursors (like pectins and hemicellulose) travel to the cell's center. These vesicles fuse to form a disc-like cell plate, which expands outward until it fuses with the parent cell wall, creating two separate daughter cells.A) BacteriumBacteria are prokaryotes and divide by binary fission. This involves replication of the chromosome and the inward growth of the cell membrane and cell wall, forming a septum. Bacteria do not have a mitotic spindle and do not form a cell plate; their division apparatus is structurally different.B) HumanHuman cells, as representative animal cells, lack a cell wall. During cytokinesis, a cleavage furrow forms. A contractile ring composed of actin and myosin filaments pinches the cell membrane inward until the cytoplasm is partitioned. No cell plate is involved.C) MushroomMushrooms are fungi, and fungal cells have cell walls made of chitin. Fungal cytokinesis often involves septation, where new cell wall material is deposited at the division site. While conceptually similar to building a partition, the process in fungi can be more variable and is not universally referred to as "cell plate" formation in the same definitive way it is for plants.D) PlantThe cell plate is a definitive structure in plant cell cytokinesis. It is formed by the fusion of vesicles guided by the phragmoplast (a microtubule structure). This process is necessary to construct a new cell wall between the daughter cells, a requirement imposed by the presence of a rigid outer wall.Conclusion:The mechanism of cytokinesis differs based on cellular structure. Bacteria divide via binary fission, animal cells use a cleavage furrow, and fungi use septation. The formation of a cell plate is a specific, vesicle-driven process unique to plant cells (and some algae), allowing for the construction of a new cell wall during division.

What organism makes a cell plate during cytokinesis?

A
Bacterium

B
Human

C
Mushroom

D
Plant

The formation of a cell plate from fusing vesicles is the distinctive mechanism of cytokinesis in plant cells, allowing them to divide while maintaining their rigid cell wall.

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What organism makes a cell plate during cytokinesis?

A Bacterium B Human C Mushroom D Plant

The formation of a cell plate from fusing vesicles is the distinctive mechanism of cytokinesis in plant cells, allowing them to divide while maintaining their rigid cell wall.

Topic Flashcards

Mini Quiz

Related Questions

A
Bacterium

B
Human

C
Mushroom

D
Plant