In eukaryotic plant cells, what is the composition of the middle lamella that cements adjacent cell walls together?
Answer and explanation
Correct answer: C. Calcium and magnesium pectate
- Step 1: During cytokinesis, plant cells form a cell plate that develops into the middle lamella.
- Step 2: The middle lamella lies between the primary walls of adjacent plant cells.
- Step 3: It is predominantly composed of calcium pectate and magnesium pectate, functioning as an intercellular cementing agent.
Answer
Calcium and magnesium pectate.
Why not the others: Cellulose microfibrils constitute the structural framework of the primary and secondary cell wall; Lignin and suberin are hydrophobic polymers deposited in secondary walls and cork tissue; Hemicellulose and pectin are matrix polysaccharides of the primary wall.
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