267341
Algin, carrageen and proteins are obtained from
1 red algae, brown algae, green algae respectively.
2 brown algae, red algae, green algae respectively.
3 red algae, green algae, brown algae respectively.
4 green algae, brown algae, red algae respectively.
Explanation:
(b)Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially. Chlorella and Spirullina are unicellular green algae, which are rich in proteins and used as food supplements.
NCERT Page-33 / N-26
Plant kingdom
267342
Pyrenoids in green algal cells are related to
1 starch formation
2 protein storage
3 general metabolism
4 enzyme secretion
Explanation:
(a) Pyrenoids are the rounded bodies found in the chloroplast of green algae and are the centres of conversion of glucose to starch and also collection of starch.
NCERT Page-32 / N-26
Plant kingdom
267343
Which one of the following statements concerning the algae is incorrect?
1 Most algae are photosynthetic.
2 Algae can be classified according to their pigments.
3 All algae are filamentous.
4 Spirogyra does not produce zoospores.
Explanation:
(c) Algae are defined as chlorophyllous, thailloid avascular plants with no cellular differentiation. The size and form of algae is highly variable. Not all the algae are filamentous. The size ranges from the microscope unicellular forms to colonial forms and to the filamentous forms.
NCERT Page-30 / N-24
Plant kingdom
267344
Which of the following example belong to the same class of algae?
1 Chara, Fucus, Polysiphonia
2 Volvox, Spirogyra, Chlamydomonas
3 Porphyra, Ectocarpus, Ulothrix
4 Sargassum, Laminaria, Gracilaria
Explanation:
(b)Chlamydomonas, Volvox, Ulothrix, Spirogyra and Chara are green algae. The common forms of brown algae are Ectocarpus, Dictyota, Laminaria, Sargassum and Fucus. Polysiphonia, Porphyra, Gracilaria and the Gelidium are members of red algae.
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Plant kingdom
267341
Algin, carrageen and proteins are obtained from
1 red algae, brown algae, green algae respectively.
2 brown algae, red algae, green algae respectively.
3 red algae, green algae, brown algae respectively.
4 green algae, brown algae, red algae respectively.
Explanation:
(b)Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially. Chlorella and Spirullina are unicellular green algae, which are rich in proteins and used as food supplements.
NCERT Page-33 / N-26
Plant kingdom
267342
Pyrenoids in green algal cells are related to
1 starch formation
2 protein storage
3 general metabolism
4 enzyme secretion
Explanation:
(a) Pyrenoids are the rounded bodies found in the chloroplast of green algae and are the centres of conversion of glucose to starch and also collection of starch.
NCERT Page-32 / N-26
Plant kingdom
267343
Which one of the following statements concerning the algae is incorrect?
1 Most algae are photosynthetic.
2 Algae can be classified according to their pigments.
3 All algae are filamentous.
4 Spirogyra does not produce zoospores.
Explanation:
(c) Algae are defined as chlorophyllous, thailloid avascular plants with no cellular differentiation. The size and form of algae is highly variable. Not all the algae are filamentous. The size ranges from the microscope unicellular forms to colonial forms and to the filamentous forms.
NCERT Page-30 / N-24
Plant kingdom
267344
Which of the following example belong to the same class of algae?
1 Chara, Fucus, Polysiphonia
2 Volvox, Spirogyra, Chlamydomonas
3 Porphyra, Ectocarpus, Ulothrix
4 Sargassum, Laminaria, Gracilaria
Explanation:
(b)Chlamydomonas, Volvox, Ulothrix, Spirogyra and Chara are green algae. The common forms of brown algae are Ectocarpus, Dictyota, Laminaria, Sargassum and Fucus. Polysiphonia, Porphyra, Gracilaria and the Gelidium are members of red algae.
267341
Algin, carrageen and proteins are obtained from
1 red algae, brown algae, green algae respectively.
2 brown algae, red algae, green algae respectively.
3 red algae, green algae, brown algae respectively.
4 green algae, brown algae, red algae respectively.
Explanation:
(b)Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially. Chlorella and Spirullina are unicellular green algae, which are rich in proteins and used as food supplements.
NCERT Page-33 / N-26
Plant kingdom
267342
Pyrenoids in green algal cells are related to
1 starch formation
2 protein storage
3 general metabolism
4 enzyme secretion
Explanation:
(a) Pyrenoids are the rounded bodies found in the chloroplast of green algae and are the centres of conversion of glucose to starch and also collection of starch.
NCERT Page-32 / N-26
Plant kingdom
267343
Which one of the following statements concerning the algae is incorrect?
1 Most algae are photosynthetic.
2 Algae can be classified according to their pigments.
3 All algae are filamentous.
4 Spirogyra does not produce zoospores.
Explanation:
(c) Algae are defined as chlorophyllous, thailloid avascular plants with no cellular differentiation. The size and form of algae is highly variable. Not all the algae are filamentous. The size ranges from the microscope unicellular forms to colonial forms and to the filamentous forms.
NCERT Page-30 / N-24
Plant kingdom
267344
Which of the following example belong to the same class of algae?
1 Chara, Fucus, Polysiphonia
2 Volvox, Spirogyra, Chlamydomonas
3 Porphyra, Ectocarpus, Ulothrix
4 Sargassum, Laminaria, Gracilaria
Explanation:
(b)Chlamydomonas, Volvox, Ulothrix, Spirogyra and Chara are green algae. The common forms of brown algae are Ectocarpus, Dictyota, Laminaria, Sargassum and Fucus. Polysiphonia, Porphyra, Gracilaria and the Gelidium are members of red algae.
267341
Algin, carrageen and proteins are obtained from
1 red algae, brown algae, green algae respectively.
2 brown algae, red algae, green algae respectively.
3 red algae, green algae, brown algae respectively.
4 green algae, brown algae, red algae respectively.
Explanation:
(b)Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially. Chlorella and Spirullina are unicellular green algae, which are rich in proteins and used as food supplements.
NCERT Page-33 / N-26
Plant kingdom
267342
Pyrenoids in green algal cells are related to
1 starch formation
2 protein storage
3 general metabolism
4 enzyme secretion
Explanation:
(a) Pyrenoids are the rounded bodies found in the chloroplast of green algae and are the centres of conversion of glucose to starch and also collection of starch.
NCERT Page-32 / N-26
Plant kingdom
267343
Which one of the following statements concerning the algae is incorrect?
1 Most algae are photosynthetic.
2 Algae can be classified according to their pigments.
3 All algae are filamentous.
4 Spirogyra does not produce zoospores.
Explanation:
(c) Algae are defined as chlorophyllous, thailloid avascular plants with no cellular differentiation. The size and form of algae is highly variable. Not all the algae are filamentous. The size ranges from the microscope unicellular forms to colonial forms and to the filamentous forms.
NCERT Page-30 / N-24
Plant kingdom
267344
Which of the following example belong to the same class of algae?
1 Chara, Fucus, Polysiphonia
2 Volvox, Spirogyra, Chlamydomonas
3 Porphyra, Ectocarpus, Ulothrix
4 Sargassum, Laminaria, Gracilaria
Explanation:
(b)Chlamydomonas, Volvox, Ulothrix, Spirogyra and Chara are green algae. The common forms of brown algae are Ectocarpus, Dictyota, Laminaria, Sargassum and Fucus. Polysiphonia, Porphyra, Gracilaria and the Gelidium are members of red algae.