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Q. No.Cyanobacteria possess several unique characteristics. Which combination of features is INCORRECT?
1. Presence of chlorophyll-a, phycobilins, and absence of motile reproductive structures
2. Formation of specialised cells called heterocysts for nitrogen fixation
3. Presence of both 70S and 80S ribosomes for protein synthesis
4. Ability to form blooms in polluted water bodies with excess nutrients
1. Presence of chlorophyll-a, phycobilins, and absence of motile reproductive structures
2. Formation of specialised cells called heterocysts for nitrogen fixation
3. Presence of both 70S and 80S ribosomes for protein synthesis
4. Ability to form blooms in polluted water bodies with excess nutrients
Subtopic: Kingdom Monera: Blue Green Algae |
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The cell wall of diatoms is characterised by which of the following features?
1. Composed entirely of peptidoglycan with siliceous depositions in certain species
2. Made of cellulose and deposited with silica forming a frustule with two overlapping theca
3. Contains chitin as the primary component with calcium carbonate deposition
4. Made of pectin embedded with silica, showing a pill-box arrangement of valves
1. Composed entirely of peptidoglycan with siliceous depositions in certain species
2. Made of cellulose and deposited with silica forming a frustule with two overlapping theca
3. Contains chitin as the primary component with calcium carbonate deposition
4. Made of pectin embedded with silica, showing a pill-box arrangement of valves
Subtopic: Kingdom Protista: Chrysophytes |
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Compare the sexual spores in Ascomycetes and Basidiomycetes. Which statement is CORRECT?
1. Ascomycetes produce basidiospores externally on basidium, while Basidiomycetes produce ascospores inside ascus
2. Both Ascomycetes and Basidiomycetes produce their sexual spores endogenously within sac-like structures
3. Ascomycetes produce ascospores endogenously in ascus, while Basidiomycetes produce basidiospores exogenously on basidium
4. Sexual spores in both groups are produced by fragmentation of hyphae followed by fusion
1. Ascomycetes produce basidiospores externally on basidium, while Basidiomycetes produce ascospores inside ascus
2. Both Ascomycetes and Basidiomycetes produce their sexual spores endogenously within sac-like structures
3. Ascomycetes produce ascospores endogenously in ascus, while Basidiomycetes produce basidiospores exogenously on basidium
4. Sexual spores in both groups are produced by fragmentation of hyphae followed by fusion
Subtopic: Kingdom Fungi: Ascomycetes | Kingdom Fungi: Basidomycetes |
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Viruses are considered at the borderline of living and non-living. Consider the following statements:
Statement I: Viruses can be crystallised and stored indefinitely without loss of infectivity, which is a non-living characteristic
Statement II: Viruses possess genetic material and can evolve through mutations, which are living characteristics
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both statements are correct and Statement II explains Statement I
4. Both statements are correct but Statement II does not explain Statement I
Statement I: Viruses can be crystallised and stored indefinitely without loss of infectivity, which is a non-living characteristic
Statement II: Viruses possess genetic material and can evolve through mutations, which are living characteristics
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both statements are correct and Statement II explains Statement I
4. Both statements are correct but Statement II does not explain Statement I
Subtopic: Virus, Viroids & Prions |
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Subtopic: Kingdom Monera: Introduction | Kingdom Monera: Bacterial Classification | Kingdom Protista: Introduction | Kingdom Protista: Euglenoids |
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Which of the following kingdoms include both unicellular and multicellular eukaryotes?
1. Protista and Fungi
2. Plantae and Animalia
3. Protista and Plantae
4. Monera and Protista
1. Protista and Fungi
2. Plantae and Animalia
3. Protista and Plantae
4. Monera and Protista
Subtopic: Different Classification Systems |
Level 3: 35%-60%
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What level of cellular organisation is found in Monera?
1. Prokaryotic
2. Eukaryotic
3. Acellular
4. Multicellular
1. Prokaryotic
2. Eukaryotic
3. Acellular
4. Multicellular
Subtopic: Kingdom Monera: Introduction |
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Archaebacteria can survive in extreme environments because of —
1. Flagella with 9 + 2 arrangement
2. Unique lipid composition of cell membrane
3. Presence of cellulose in cell wall
4. Absence of DNA
1. Flagella with 9 + 2 arrangement
2. Unique lipid composition of cell membrane
3. Presence of cellulose in cell wall
4. Absence of DNA
Subtopic: Archaebacteria |
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Subtopic: Archaebacteria |
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Cyanobacteria differ from other eubacteria in possessing —
1. Photosynthetic pigments and thylakoids
2. Cell wall without peptidoglycan
3. Circular DNA enclosed in nucleus
4. Mitochondria
1. Photosynthetic pigments and thylakoids
2. Cell wall without peptidoglycan
3. Circular DNA enclosed in nucleus
4. Mitochondria
Subtopic: Kingdom Monera: Blue Green Algae |
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