Question

Chloroplasts of Spirogyra have

• A. Smooth margin
• B. Wavy margin
• C. Smooth or wavy margin
• D. None of the above

Answer 1

The correct option is C Smooth or wavy margin

Chloroplasts are embedded in the peripheral cytoplasm; their numbers are variable (as few as one). The chloroplasts are ribbon shaped, serrated or scalloped, and spirally arranged, resulting in the prominent and characteristic green spiral on each filament. The margin of chloroplasts may be smooth or wavy or serrated.

Each chloroplast contains several pyrenoids, centers for the production of starches, appearing as small round bodies. The chloroplast of Spirogyra is a long, spirally coiled ribbon, which may contract to form a short, nearly straight rod.

So, the correct answer is option C.