Match the specific diseases in Column I with their corresponding infectious agents in Column II.
Column I
Column II
A. Citrus canker
1. Prion
B. Potato spindle tuber disease
2. Virus
C. Bovine spongiform encephalopathy (BSE)
3. Viroid
D. AIDS
4. Bacteria
Citrus canker is bacterial, potato spindle tuber disease is caused by viroids, BSE is caused by prions, and AIDS is caused by a virus.
Question 292 of 300
📘 CLASS XI
Match the mycelial structures in Column I with the correct Fungal classes in Column II.
Column I
Column II
A. Aseptate and coenocytic
1. Basidiomycetes
B. Branched and septate (produces ascospores)
2. Deuteromycetes
C. Branched and septate (sex organs absent)
3. Phycomycetes
D. Septate and branched (only asexual phase known)
4. Ascomycetes
Phycomycetes are aseptate and coenocytic, Ascomycetes are branched and septate, Basidiomycetes lack sex organs, and Deuteromycetes possess only the asexual stage.
Question 293 of 300
📘 CLASS XI
Match the events of sexual reproduction in Fungi (Column I) with the classes they prominently occur in (Column II).
Column I
Column II
A. Fusion of morphologically similar gametes (Isogamous)
1. Deuteromycetes
B. Dikaryotic stage (n + n)
2. Basidiomycetes
C. Plasmogamy by fusion of somatic cells
3. Ascomycetes and Basidiomycetes
D. Sexual reproduction absent/unknown
4. Phycomycetes
Isogamous fusion occurs in Phycomycetes, the dikaryotic stage occurs in Ascomycetes and Basidiomycetes, somatic cell fusion is typical of Basidiomycetes, and Deuteromycetes lack a known sexual stage.
Question 294 of 300
📘 CLASS XI
Match the historical discoveries of Virology in Column I with their respective years in Column II.
Column I
Column II
A. Dmitri Ivanowsky recognises TMV microbes
1. 1971
B. M.W. Beijerinck names the virus
2. 1892
C. W.M. Stanley crystallises viruses
3. 1898
D. T.O. Diener discovers viroids
4. 1935
Ivanowsky (1892), Beijerinck (1898), Stanley (1935), and Diener (1971) made these landmark discoveries in virology.
Question 295 of 300
📘 CLASS XI
Match the components of Lichens in Column I with their functions in Column II.
Column I
Column II
A. Phycobiont
1. Heterotrophic, provides shelter and absorbs nutrients
B. Mycobiont
2. Autotrophic, prepares food
C. Symbiotic association
3. Do not grow in polluted areas
D. Lichens as indicators
4. Mutually useful association between algae and fungi
The phycobiont prepares food, the mycobiont provides shelter and absorbs water and minerals, lichens are mutualistic associations, and they serve as pollution indicators because they do not grow in polluted areas.
Question 296 of 300
📘 CLASS XI
Match the Fungal fruiting bodies in Column I with their respective spores in Column II.
Column I
Column II
A. Sporangium
1. Conidia
B. Ascocarp
2. Zoospores/Aplanospores
C. Basidiocarp
3. Ascospores
D. Conidiophore
4. Basidiospores
Sporangia produce zoospores or aplanospores, ascocarps bear asci containing ascospores, basidiocarps bear basidia producing basidiospores, and conidiophores bear conidia exogenously.
Question 297 of 300
📘 CLASS XI
Match the cell boundaries of the 5 Kingdoms in Column I with their respective presence/absence in Column II.
Column I
Column II
A. Cell wall in Animalia
1. Present (composed of chitin)
B. Nuclear membrane in Monera
2. Absent
C. Cell wall in Fungi
3. Present (eukaryotic feature)
D. Nuclear membrane in Protista
4. Absent (prokaryotic feature)
Animal cells lack cell walls. Monerans lack a nuclear membrane. Fungi possess chitinous cell walls, while Protista are eukaryotic and possess a nuclear membrane.
Question 298 of 300
📘 CLASS XI
Match the viral structures in Column I with their biological roles in Column II.
Column I
Column II
A. Capsid
1. The infectious component of the virus
B. Capsomeres
2. The overall nature of a virus
C. Genetic material (RNA/DNA)
3. Small subunits arranged in helical or polyhedral forms
D. Nucleoprotein
4. Protects the nucleic acid
The capsid protects viral nucleic acid, capsomeres are its structural subunits, the nucleic acid is the infectious component, and a virus is an infectious nucleoprotein.
Question 299 of 300
📘 CLASS XI
Match the habitats/lifestyles in Column I with the correct Moneran group in Column II.
Column I
Column II
A. Live as parasites in/on other organisms
1. Cyanobacteria
B. Form blooms in polluted water bodies
2. Heterotrophic bacteria (e.g. Rhizobium)
C. Fix atmospheric nitrogen in roots (legumes)
3. Mycoplasma
D. Pathogenic in animals and plants, lacking a cell wall
4. Various Eubacteria/Archaebacteria
Many bacteria live as parasites. Cyanobacteria commonly form blooms in polluted water. Rhizobium, a heterotrophic eubacterium, fixes atmospheric nitrogen in the roots of legumes. Mycoplasma lack a cell wall and are pathogenic to plants and animals.
Question 300 of 300
📘 CLASS XI
Match the specific examples of Deuteromycetes in Column I with their general characteristics in Column II.
Column I
Column II
A. Deuteromycetes reproduction
1. Large number act as decomposers of litter
B. Deuteromycetes mycelium
2. Septate and branched
C. Deuteromycetes ecological role
3. Alternaria, Colletotrichum, Trichoderma
D. Deuteromycetes examples
4. Only by asexual spores (conidia)
Deuteromycetes reproduce only by asexual spores (conidia). Their mycelium is septate and branched. A large number act as decomposers of litter, and common examples include Alternaria, Colletotrichum and Trichoderma.
