NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 100 of 104)
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- Senescence of detached leaves can be delayed by the use of
- Auxin
- Gibberellins
- Cytokines
- Ethylene
- Match List I (phenomena) with List II (growth regulators) and select the correct answer
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 100 of 104) List-I List-II - Root differentiation
- Vegetative bud differentiation
- Flower bud differentiation
- Fruit development
- Kinins followed by auxins
- Auxins followed by kinins
- Auxins plus gibberellins
- Auxins plus carbohydrates
- A
- B
- C
- D
- 4
- 3
- 1
- 2
- 4
- 1
- 2
- 3
- 3
- 2
- 1
- 4
- 1
- 4
- 3
- 2
- Which of the following pairs are correctly matched?
- Match Item 1: Angular leaf-spot:
- Match Item 2: Xanthomonas of cotton malvacearum
- Match Item 1: Wilt of cotton
- Match Item 2: Fusarium oxysporum
- Match Item 1: Leaf spot of cotton:
- Match Item 2: Alter aria lini
- Match Item 1: Red rot of sugar-cane:
- Colletcrichum falcatum
- Select the correct answer
- 1,2 and 3
- 1,3 and 4
- 1,2 and 4
- 2,3 and 4
- In which one of the following pathogens do the cells of promycelium after the germination of teleutospore produce infection hyphae instead of basidiospores?
- Ustilago scitaminae
- Tilletia foetida
- Tilletia tritici
- Ustilago tritici
- Which one of the following substances plays an important role in biochemical defense of host plants?
- Mycotoxin
- Phytoalexin
- Pathotoxin
- Vivotoxin
- Match List I (enzymes of pathogens) with List II (host substrates) and select the correct answer
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 100 of 104) List-I List-II - Pectin methyl esterase
- Cx enzyme
- Polygalacturonase
- C1 enzyme
- Linear anhydroglucose chain
- Pectic acid
- Native cellulose
- Pectin
- A
- B
- C
- D
- 4
- 3
- 2
- 1
- 4
- 1
- 2
- 3
- 2
- 3
- 4
- 1
- 2
- 1
- 4
- 3
- The following diagrams (leveled 1,2, 3,4) are reproductive bodies of pathogenic fungi: Among these, those representing the products of sexual reproduction would include
- 2 and 4
- 1 and 3
- 3 and 4
- 1,3 and 4
- Which one of the following microorganisms is widely used for the biological control of plant diseases?
- Trichoderma viride
- Fusarium cubense
- Streptomyces scabies
- Bacillus subtilis
- Which one of the following is the basis of biological control of crown gall?
- Agro bacterium radiocasted strains contain a plasmid which directs the synthesis of bactenocin
- The Ti (tumour inducing) plasmid in Agro bacterium tumefactions is integrated with host plant DNA and is transcribed into mRNA
- The cloning strategy leading to a composite (chimeric) plasmid harboring two or more genes that code for distinct bacteriocins against phytopathogenic bacteria
- Agobbacterium radiobacter plasmid interferes with the production of auxin by a tumefaction
- Which of the following pairs are correctly matched?
- Match Item 1: Datura stramonium
- Match Item 2: Solanine
- Match Item 1: Papaver somniforum
- Match Item 2: Narceine
- Match Item 1: Cannabis sativa
- Match Item 2: Cocaine
- Select the correct answer
- 1,2 and 3
- 1 and 2
- 1 and 3
- 2 and 3
- Which of the owing statements regarding the maintenance of carbon cycle in the biosphere are correct?
- Plant utilize solar energy to convert CO2 and water into cellular materials and produce oxygen that animals consume.
- Oxygen produced by the plants during carbon assimilation is not a byproduct.
- Energy used by an animal comes form the oxidation of plant material releasing CO2 that escapes into the atmosphere.
- All decaying organic matter on the earth is ultimately degraded by molds and bacteria to yield CO2 that escapes into the atmosphere
- Select the correct answer.
- 2,3 and 4
- 1,3 and 4
- 1 and 2
- 1,2, 3 and 4
- Which one of the following plants is the source of gum-Arabic
- Coffea arabica
- Prospis spiciagera
- Albizzia lebbek
- Acacia sengal
- Match List I (bioinsecticidal compounds) with List II (plant species) and select the correct answer
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 100 of 104) List-I List-II - Rotenone
- Nimbidin
- Dernissine
- Pyrethnim
- Derris elliptical
- Azadirachta indicia
- Solanum khasianum
- Chrysanthemum cineraria folium
- A
- B
- C
- D
- 1
- 2
- 3
- 4
- 1
- 2
- 4
- 3
- 2
- 1
- 3
- 4
- 2
- 1
- 4
- 3
- Which one of the following groups of characteristics is applicable to the timber obtained from Sal (Shorea) ?
- Strong, durable, moderately heavy, takes good polish.
- Strong, durable, heavy, does not take good polish
- Strong, durable, heavy, takes good polish
- Not strong, durable if not exposed, light, does not take good polish
- The following plants contain caffeine:
- Coffee
- Yucca
- Cola
- Tea
- Cocoa
- The correct sequence of the ascending order (lowest first, highest last) of the caffeine content of these plants is
- 5, 1,4, 3,2
- 1, 5,3, 4,2
- 1, 5,4, 2,3
- 5, 1,3, 4,2