Which is present nearest to plasma membrane in plant cell?
Correct answer: A. Secondary wall
- A. Secondary wall
- B. Primary wall
- C. Middle lamella
- D. Tonoplast
Explanation
The cell wall in plants and few algae consists of three important layers:The primary cell wall is the outermost thin, flexible and extensible layer.The secondary cell wall is a thick layer present inside the primary cell wall and is sandwiched between the plasmalemma and primary cell wall.The middle lamella is the first formed layer which is rich in pectins and forms plasmodesmata connections between adjacent cell walls.So, the correct answer is 'Secondary wall'.
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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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