Question

Algae have cell wall made up of
A. Cellulose, hemicellulose and pectins
B. Cellulose, galactose and mannans
C. Hemicellulose, pectin and proteins
D. Pectin, cellulose and proteins

Answer 1

Hint:Algae is a natural, non-blooming typically aquatic plant of a huge group that incorporates the seaweeds and many single-celled structures. It comprises chlorophyll however the absence of true stems, roots, leaves, and vascular tissue. In simple words, it is an assorted group of aquatic organisms that can perform photosynthesis. Certain algae are recognizable to the vast majority.

Complete answer:
● There are 3 main classes of algae:
● Rhodophyceae: Because of the presence of water-soluble pigment (r-phycoerythrin) in it, they
are known as red algae. The cell wall of Rhodophyceae is composed of cellulose and pectin
along with hydrocolloids and carrageenan.
● Phaeophyceae: In the case of Phaeophyceae, brown pigment masked the effect of chlorophyll.
The cell all of Phaeophyceae is composed of cellulose protected by a gelatinous coating of
aligning (a component of hydrocolloids).
● Chlorophyceae: Because of the price essence of green colour pigments (chlorophyll), they are
known as Chlorophyceae.
● The outer cell wall is made up of cellulose and the inner cell wall is made up of pectose.
● In algal cell walls, hemicellulose and pectin are absent while bacterial cell wall is made
peptidoglycan.
So, from the above, we can conclude that option B is correct that is cellulose, galactose, and
mannans while in other options hemicellulose and pectin are present.

Note: Algae with their enhancing popularity because of their versatility are finding applications in various originating areas such as a nutritional supplement, fertilizer, pigment and stabilizing agents, pharmaceutical and in medical fields. It has been accepted as a rich energy source and thus has been used to develop various biofuels such as hydrogen, methane, bio-ethanol, biodiesel etc.