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NEET UG BIOLOGY MCQ: BIOLOGICAL CLASSIFICATION
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Analyzing
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Read the following features.
(a) Nitrogenase activity in vegetative cells under aerobic conditions
(b) Mucilaginous sheath covering
(c) Presence of carbon as well as nitrogen fixing enzymes
(d) Presence of both pigment systems in heterocyst
How many of the given features is/are correct for a filamentous blue green alga, Nostoc?
(a) Nitrogenase activity in vegetative cells under aerobic conditions
(b) Mucilaginous sheath covering
(c) Presence of carbon as well as nitrogen fixing enzymes
(d) Presence of both pigment systems in heterocyst
How many of the given features is/are correct for a filamentous blue green alga, Nostoc?
View answer and explanation
Correct option: B
Two
Option B (Two) is correct because Nostoc exhibits a mucilaginous sheath and nitrogenase activity in heterocysts, but lacks carbon-fixing enzymes in heterocysts and does not have both pigment systems in heterocysts.
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