258242
The structure present in cyanobacteria (BGA) helping is $\mathbf{N}_{\mathbf{2}}$ fixation is
1 haplosperm
2 holostrum
3 holotrema
4 heterocyst
Explanation:
The structure present in Cyanobacteria(BGA) helping in $\mathrm{N}_{2}$-fixation is called heterocyst. - The trichome of Nostoc are characterized by the presence of heterocysts which are intercalary. The intercalary heterocyst has two polar nodules and the terminal ones have only one polar nodule.
Punjab MET-2008
Biological Classification
258243
Which of the following statements about inclusion bodies in incorrect?
1 These are involved in ingestion of food particles
2 They lie free in the cytoplasm
3 These represent reserve material in cytoplasm
4 They are not bound by any membrane
Explanation:
Inclusion bodies are particles that are freely found in the cytoplasm of the cell. - They are formed via multiplication of virus or bacteria in the host cell and can also be used for diagnosis of the respective viral or bacterial disease. - They help in storage of cellular metabolic products and are not membrane bound. - Inclusion bodies don't play a role in ingestion of food particles.
NEET-2020 Phase-I
Biological Classification
258244
Inclusion bodies of blue-green, purple and green photosynthetic bacteria are
1 Microtubules
2 Contractile vacuoles
3 Gas vacuoles
4 Centrioles
Explanation:
Blue green algae, purple and green photosynthetic bacteria have gas vacuole as inclusion bodies. - Inclusion bodies are reserved materials found in prokaryotic cells and are stored in cytoplasm. - They are gas vacuoles and cyanophycean granules.
NEET-2020 Phase-II
Biological Classification
258245
Which of the following is incorrect about Cyanobacteria?
1 They have chlorophyll A similar to green plants
2 They are photoautotrophs
3 They lack heterocysts
4 They often form blooms in polluted water bodies
Explanation:
Cyanobacteria have heterocysts that fixes atmospheric nitrogen to $\mathrm{NO}_{2}, \mathrm{NO}_{3}{ }^{+}$. - Heterocysts or heterocytes are specialized nitrogen fixing cells formed during nitrogen starving by some filamentous cyanobacteria, such as Nostoc, Anabaena. - They fix nitrogen from dinitrogen $\left(\mathrm{N}_{2}\right)$ in the air using the enzyme nitrogenase.
258242
The structure present in cyanobacteria (BGA) helping is $\mathbf{N}_{\mathbf{2}}$ fixation is
1 haplosperm
2 holostrum
3 holotrema
4 heterocyst
Explanation:
The structure present in Cyanobacteria(BGA) helping in $\mathrm{N}_{2}$-fixation is called heterocyst. - The trichome of Nostoc are characterized by the presence of heterocysts which are intercalary. The intercalary heterocyst has two polar nodules and the terminal ones have only one polar nodule.
Punjab MET-2008
Biological Classification
258243
Which of the following statements about inclusion bodies in incorrect?
1 These are involved in ingestion of food particles
2 They lie free in the cytoplasm
3 These represent reserve material in cytoplasm
4 They are not bound by any membrane
Explanation:
Inclusion bodies are particles that are freely found in the cytoplasm of the cell. - They are formed via multiplication of virus or bacteria in the host cell and can also be used for diagnosis of the respective viral or bacterial disease. - They help in storage of cellular metabolic products and are not membrane bound. - Inclusion bodies don't play a role in ingestion of food particles.
NEET-2020 Phase-I
Biological Classification
258244
Inclusion bodies of blue-green, purple and green photosynthetic bacteria are
1 Microtubules
2 Contractile vacuoles
3 Gas vacuoles
4 Centrioles
Explanation:
Blue green algae, purple and green photosynthetic bacteria have gas vacuole as inclusion bodies. - Inclusion bodies are reserved materials found in prokaryotic cells and are stored in cytoplasm. - They are gas vacuoles and cyanophycean granules.
NEET-2020 Phase-II
Biological Classification
258245
Which of the following is incorrect about Cyanobacteria?
1 They have chlorophyll A similar to green plants
2 They are photoautotrophs
3 They lack heterocysts
4 They often form blooms in polluted water bodies
Explanation:
Cyanobacteria have heterocysts that fixes atmospheric nitrogen to $\mathrm{NO}_{2}, \mathrm{NO}_{3}{ }^{+}$. - Heterocysts or heterocytes are specialized nitrogen fixing cells formed during nitrogen starving by some filamentous cyanobacteria, such as Nostoc, Anabaena. - They fix nitrogen from dinitrogen $\left(\mathrm{N}_{2}\right)$ in the air using the enzyme nitrogenase.
258242
The structure present in cyanobacteria (BGA) helping is $\mathbf{N}_{\mathbf{2}}$ fixation is
1 haplosperm
2 holostrum
3 holotrema
4 heterocyst
Explanation:
The structure present in Cyanobacteria(BGA) helping in $\mathrm{N}_{2}$-fixation is called heterocyst. - The trichome of Nostoc are characterized by the presence of heterocysts which are intercalary. The intercalary heterocyst has two polar nodules and the terminal ones have only one polar nodule.
Punjab MET-2008
Biological Classification
258243
Which of the following statements about inclusion bodies in incorrect?
1 These are involved in ingestion of food particles
2 They lie free in the cytoplasm
3 These represent reserve material in cytoplasm
4 They are not bound by any membrane
Explanation:
Inclusion bodies are particles that are freely found in the cytoplasm of the cell. - They are formed via multiplication of virus or bacteria in the host cell and can also be used for diagnosis of the respective viral or bacterial disease. - They help in storage of cellular metabolic products and are not membrane bound. - Inclusion bodies don't play a role in ingestion of food particles.
NEET-2020 Phase-I
Biological Classification
258244
Inclusion bodies of blue-green, purple and green photosynthetic bacteria are
1 Microtubules
2 Contractile vacuoles
3 Gas vacuoles
4 Centrioles
Explanation:
Blue green algae, purple and green photosynthetic bacteria have gas vacuole as inclusion bodies. - Inclusion bodies are reserved materials found in prokaryotic cells and are stored in cytoplasm. - They are gas vacuoles and cyanophycean granules.
NEET-2020 Phase-II
Biological Classification
258245
Which of the following is incorrect about Cyanobacteria?
1 They have chlorophyll A similar to green plants
2 They are photoautotrophs
3 They lack heterocysts
4 They often form blooms in polluted water bodies
Explanation:
Cyanobacteria have heterocysts that fixes atmospheric nitrogen to $\mathrm{NO}_{2}, \mathrm{NO}_{3}{ }^{+}$. - Heterocysts or heterocytes are specialized nitrogen fixing cells formed during nitrogen starving by some filamentous cyanobacteria, such as Nostoc, Anabaena. - They fix nitrogen from dinitrogen $\left(\mathrm{N}_{2}\right)$ in the air using the enzyme nitrogenase.
258242
The structure present in cyanobacteria (BGA) helping is $\mathbf{N}_{\mathbf{2}}$ fixation is
1 haplosperm
2 holostrum
3 holotrema
4 heterocyst
Explanation:
The structure present in Cyanobacteria(BGA) helping in $\mathrm{N}_{2}$-fixation is called heterocyst. - The trichome of Nostoc are characterized by the presence of heterocysts which are intercalary. The intercalary heterocyst has two polar nodules and the terminal ones have only one polar nodule.
Punjab MET-2008
Biological Classification
258243
Which of the following statements about inclusion bodies in incorrect?
1 These are involved in ingestion of food particles
2 They lie free in the cytoplasm
3 These represent reserve material in cytoplasm
4 They are not bound by any membrane
Explanation:
Inclusion bodies are particles that are freely found in the cytoplasm of the cell. - They are formed via multiplication of virus or bacteria in the host cell and can also be used for diagnosis of the respective viral or bacterial disease. - They help in storage of cellular metabolic products and are not membrane bound. - Inclusion bodies don't play a role in ingestion of food particles.
NEET-2020 Phase-I
Biological Classification
258244
Inclusion bodies of blue-green, purple and green photosynthetic bacteria are
1 Microtubules
2 Contractile vacuoles
3 Gas vacuoles
4 Centrioles
Explanation:
Blue green algae, purple and green photosynthetic bacteria have gas vacuole as inclusion bodies. - Inclusion bodies are reserved materials found in prokaryotic cells and are stored in cytoplasm. - They are gas vacuoles and cyanophycean granules.
NEET-2020 Phase-II
Biological Classification
258245
Which of the following is incorrect about Cyanobacteria?
1 They have chlorophyll A similar to green plants
2 They are photoautotrophs
3 They lack heterocysts
4 They often form blooms in polluted water bodies
Explanation:
Cyanobacteria have heterocysts that fixes atmospheric nitrogen to $\mathrm{NO}_{2}, \mathrm{NO}_{3}{ }^{+}$. - Heterocysts or heterocytes are specialized nitrogen fixing cells formed during nitrogen starving by some filamentous cyanobacteria, such as Nostoc, Anabaena. - They fix nitrogen from dinitrogen $\left(\mathrm{N}_{2}\right)$ in the air using the enzyme nitrogenase.
