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Certain marine brown algae contain algin, which is commercially important. Algin is a type of:
Carrageenan
Agar
Floridean starch
Phycocolloid
Which of the following is a characteristic feature of Phaeophyceae cell walls?
Presence of cellulose only
Presence of chitin
Presence of algin
Absence of cell wall
Which specific characteristic of algin in Phaeophyceae contributes significantly to its commercial applications as a stabilizing agent?
Its high cellulose content providing structural rigidity
Its ability to form viscous gels in the presence of divalent cations
Its potent antimicrobial properties preventing spoilage
Its rapid degradation facilitating easy removal
The cell wall of Phaeophyceae is composed of:
Cellulose and pectin
Cellulose and algin
Chitin
Peptidoglycan
Match the algae with its major product:
| Algae | Product |
|---|---|
| 1. Chondrus | A. Algin |
| 2. Laminaria | B. Carrageenan |
| 3. Gracilaria | C. Agar |
| 4. Gelidium | D. Carrageenan |
Choose the correct matching:
1-A, 2-B, 3-C, 4-D
1-B, 2-A, 3-D, 4-C
1-C, 2-D, 3-A, 4-B
1-D, 2-C, 3-B, 4-A
Consider the following statements about brown algae
I. The largest kelps are Nereocystis and Macrocystis
II. Brown algae have gelatinous coating outside the, cellulosic cell wall called algin
III. Food obtained from Laminaria saccharina is known as ‘Kombu’
Which of the statements given above are correct?
I and II
I and III
II and III
I, II and III
Algin is a phycocalloid, obtained from the cell walls of
Chlamydomonas, valvox
Laminaria, Fucus
Gelidium, Gracilaria
Ulothrix, Porphyra
(A): Algin is obtained from algae
(R): Vinblastin is a secondary metabolite.
both (A) and (R) are true and (R) is the correct explanation of (A)
both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
both (A) and (R) are false.
(A): Algin is obtained from algae
(R): Vinblastin is a secondary metabolite.
both (A) and (R) are true and (R) is the correct explanation of (A)
both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
both (A) and (R) are false.
