MCQ
Alginic acid is obtained from:
- ARed algae
- BGreen algae
- CDiatoms
- DBrown algae
Explanation:
Alginic acid is also called as Algin or Alginate.
It is an anionic and hydrophilic polysaccharide present in the cell walls of brown algae i.e.
Phaeophyceae. It is a linear copolymer made up of residues D - mannuronic acid and L - glucuronic acid.
In brown algae, the cell wall consists of cellulose and alginic acid.
Cellulosic wall is covered from outside by a gelatinous coating of Algin.
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Statement $I$: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid ( $N$-terminal).
Statement $II$: Adult human haemoglobin, consists of $4$ subunits (two subunits of $\alpha$ type and two subunits of $\beta$ type.)
In the light of the above statements, choose the correct answer from the options given below: