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Get Answers to all your Questions
- #Cell Structure and Function
- #National Eligibility Cum Entrance Test
- #Class 11
- #Medical
- #Biology
- #National Eligilibility Cum Entrance Test
The cell wall of algae is made up of:
(a) Cellulose (b) Galactans
(c) CaCO3(Calcium carbonate) (d) Hemicellulose
(e) Suberin (f) Mannans
a, e, d, f
a, b, c, d
a, b, d, e
a, b, c, f
Answers (1)
The cell wall of algae is a complex structure that is composed of a variety of polysaccharides, glycoproteins, and sometimes even minerals. The composition of the cell wall varies among different groups of algae, but some of the common components include:
(a) Cellulose: Cellulose is a linear polysaccharide composed of glucose units linked by β-1,4 glycosidic bonds. It is the main component of the cell wall of many green algae and some diatoms.
(b) Galactans: Galactans are complex polysaccharides composed of galactose units linked by α-1,3 and/or β-1,4 glycosidic bonds. They are found in the cell walls of many red algae, where they provide rigidity and strength.
(c) CaCO3 (Calcium carbonate): Some algae, such as coccolithophores and certain red algae, secrete calcium carbonate as a structural component of their cell walls.
(d) Hemicellulose: Hemicellulose is a complex mixture of polysaccharides that includes xyloglucans, xylans, and mannans. It is found in the cell walls of some brown algae.
(e) Suberin: Suberin is a complex mixture of fatty acids and glycerol that is found in the cell walls of some brown algae, where it provides protection against desiccation and other environmental stresses.
(f) Mannans: Mannans are polysaccharides composed of mannose units linked by α-1,4 glycosidic bonds. They are found in the cell walls of some red and green algae, where they provide structural support.
Therefore, the correct answer to the question is: the cell wall of algae is made up of a variety of components, including cellulose, galactans, calcium carbonate, hemicellulose, suberin, and mannans, depending on the group of algae.
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