Question

Golden brown protists are

• A. Bacillariophyceae
• B. Dinophyceae
• C. Both bacillariophyceae and dinophyceae
• D. Euglenophyceae

Answer 1

Answer: (C)

Both bacillariophyceae and dinophyceae

• Bacillariophyceae (diatoms) are microscopic and mostly unicellular algae, that have the yellowish‐brown pigment xanthophyll apart from chlorophyll, which is responsible for the golden brown colour.
• Dinophyceae have a group of xanthophylls (apart from photosynthetic pigment chlorophyll )that appears to be unique to dinoflagellates, typically peridinin, dinoxanthin, and diadinoxanthin. These pigments give dinoflagellates their typical golden brown colour.

Euglenophyceae are mostly colourless.

So the correct answer is option C.