Question

What is the main component of the cell wall in Bacillariophyceae (Diatoms)?

• A. Cellulose
• B. Silica
• C. Chitin
• D. Pectin

Hint:

Diatomaceous earth, formed from accumulated diatom shells, is rich in silica.

Answer 1

The Correct Option is B

Concept: Diatoms are unicellular algae belonging to Bacillariophyceae, known for their unique cell wall structure.
Step 1: Understanding diatom cell wall.}
The cell wall of diatoms is called a frustule, which is made up of two overlapping halves.
Step 2: Identifying composition.}
The frustule is primarily composed of silica (hydrated silicon dioxide), giving it a glass-like appearance.
Step 3: Eliminating other options.}

• Cellulose – Found in plant cell walls.
• Chitin – Found in fungi.
• Pectin – Present in plant cell walls.