The outer cell-wall of Spirogyra is made up of-a)Celluloseb)Pectin/Pectosec)Hemicellulosed)ProteinCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

The cell wall consists of an inner layer of cellulose and an outer layer of pectin, which is responsible for the slippery texture of the algae. Spirogyra species can reproduce both sexually and asexually.

So option b is correct answer . It is made up of Pectin or Pectose.

Hope you understand it .

Thank you very much.

Answer

Cell wall is the outermost protective double layered structure. Each cell of Spirogyra is surrounded by two layered cell wall. The inner layer of which is made of cellulose and the outer layer contains pectose. The outermost lining of pectose turns into pectin and get dissolved in water to form mucilage, which surrounds the filament and forms mucilagenous sheath. Thus,both A and B will be ans .

Answer

The outer cell-wall of Spirogyra is made up of Pectin/Pectose.

Explanation:
Spirogyra is a filamentous green algae that belongs to the Chlorophyta division. It is commonly found in freshwater habitats, such as ponds and slow-moving streams.

Composition of the outer cell-wall:
The outer cell-wall of Spirogyra is composed of a complex polysaccharide known as pectin or pectose. Pectin is a structural component of the cell-wall, providing it with strength and rigidity.

Function of pectin in the cell-wall:
1. Structural support: Pectin helps to maintain the shape and integrity of the cell-wall, allowing the Spirogyra filament to maintain its structure and withstand external pressures.
2. Cell adhesion: Pectin plays a role in cell adhesion, allowing the filaments to stick together and form a cohesive structure. This is important for the formation of Spirogyra colonies or mats.
3. Protection: The pectin layer provides protection against physical damage and prevents the entry of pathogens or harmful substances into the cell.

Comparison with other components:
a) Cellulose: Cellulose is a common component of plant cell walls, but it is not found in Spirogyra. Instead, cellulose is found in the inner cell wall layer of Spirogyra.
c) Hemicellulose: Hemicellulose is another component of plant cell walls, but it is not present in the outer cell-wall of Spirogyra.
d) Protein: Proteins are important components of cell membranes and some cell walls, but they are not the primary component of Spirogyra's outer cell-wall.

Conclusion:
The outer cell-wall of Spirogyra is primarily composed of pectin or pectose, which provides structural support, cell adhesion, and protection to the filamentous green algae.

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