SCIENCE
PLANT KINGDOM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Algae increase the level of dissolved oxygen in the immediate environment
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Algin is obtained from red algae and carrageenan from brown algae
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Agar-agar is obtained from Gelidium and Gracilaria
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Laminaria and sargassum are used as food
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Detailed explanation-1: –Algin is obtained from brown algae and carrageenan is obtained from red algae.-Carrageenan is present in red seaweeds. It is used to thicken a variety of foods, ice cream, salad dressings, chocolate milk, and jellies.-Algin is present in brown seaweeds.
Detailed explanation-2: -Algin is obtained from cell wall of brown algae such as Macrocystic and Fucus.
Detailed explanation-3: -Abstract. Algae are common all over the Earth. Due to their rich chemical composition and content of bioactive substances they have been used in many fields of industry. Their gelling, thickening and stabilizing properties have led to the development of such products as agar, alginate and carrageenan.
Detailed explanation-4: -They posses chlorophyll and hence are autotrophic in nature. They can be classified based on the pigments present in them like carotenes, xanthophll, chlorophyll. Hence, the incorrect statement is option c.
Detailed explanation-5: -Carrageenan is a water-soluble sulfated polysaccharide extracted from various species of Rhodophyta (red marine algae) and consists of long linear chains of D-galactose and D-anhydrogalactose with anionic sulfate groups (OSO3−) (Liu et al., 2015).