NEET BIOLOGY

Detailed explanation-1: -Fucoxanthin is a xanthophyll that contributes more than 10% of the estimated total production of carotenoids in nature. It is an accessory pigment found in the chloroplasts of many brown macroalgae, such as Fucus spp., and the golden-brown unicellular microalgae, the diatoms.

Detailed explanation-2: -Fucoxanthin is an orange-colored pigment, along with chlorophylls a and c and -carotene, present in Chromophyta (Heterokontophyta or Ochrophyta), including brown seaweeds (Phaeophyceae) and diatoms (Bacillariophyta) [2, 3].

Detailed explanation-3: -Detailed Solution The correct answer is option 1 i.e In photosynthesis by green plants carbon dioxide is used for making carbohydrate. Explanation: Photosynthesis: Photosynthesis requires sunlight, carbon dioxide and water to produce glucose.

Detailed explanation-4: -Phaeophyceae or brown algae comprise about 2000 species that are mostly marine. They possess abundant of fucoxanthin pigment along with chlorophyll a and chlorophyll c.