Competitive Exams: Botany MCQs (Practice-Test 2 of 104)

  1. The statement, Even in the absence of a balance between the primary evolutionary agents, two or more alleles can be main. Tamed together in the same panmictic population for indefinite periods of time, refers to

    1. Polymorphism

    2. Heterocyst

    3. Balance polymorphism

    4. Geographic polymorphism

  2. Senescence is

    1. A process of shedding leaves

    2. An irreversible catabolic phase of the aging process

    3. A process of shedding flowers

    4. A reversible metabolic phase in the growth of the plant

  3. Match list I (Structure) with list II (Explanation/definition) and select the correct answer:

    List-I List-II
    1. Nucleoside

    2. Nucleotide

    3. Nucleolus

    4. Nucleosome

    1. Deeply stained body containing rRNA

    2. Portion of a DNA or RNA composed of one deoxyribose (in DNA) or ribose (in RNA) plus a purine or a pyramiding

    3. Short disk-shaped cylinders composed of nucleoproteins and spaced at roughly 100 A intervals on chromosomes

    4. Portion of DNA or RNA composed of a purine or pyramiding base, a deoxyribose (in DNA) or a ribose (in RNA) and phosphoric acid

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  4. Which one of the following is the causal organism of trust disease of pea?

  5. Match List I (Disease) with List II (causal organism) and select the correct answer:

    List-I List-II
    1. Blast disease of rice

    2. Leaf blight of rice

    3. Smut of maize

    4. Leaf rust of wheat

    1. Xanthomonous orzo

    2. Pyricularia oiyzae

    3. Puccinia graminis

    4. Ustilago maydis

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  6. During the breakdown of cellulose in host cell wall by fun. Gal pathogens, the sequence of cellulites enzymes involved is

    1. C1 cellulose, cellobiase, C cellulose

    2. cellobiase, C cellulose, C1 cellulose

    3. C1 cellulose, C cellulose, cellobiase

    4. C, cellulose, cellobiase, C1 cellulose

  7. From which one of the following sets of plants is rubber obtained?

    1. Hevea brasiliensis, Castilla elastica, Landolphia thallarmii

    2. Ficus elaslica, Parthenium argentatum, Artocapus integrifolia

    3. Fiats bengalensis, Ficus elastica, Cryptostegia grand flora

    4. Taraxacum, Euphorbia tirucalli

    Calotripis procera

  8. Match List I with List II and select the correct answer:

    List-I List-II
    1. Oryza sativa

    2. Curcuma longa

    3. Coriandrum sativum

    4. Arachis hypogea

    1. Coking Oil

    2. Food

    3. Dye

    4. Spice

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  9. Which one of the following is the botanical name of oil palm?

    1. Elaeis guineensis

    2. Olea europeaea

    3. Cocas nucifera

    4. Carthmus tintorius

  10. Match List I with List II and select the correct answer:

    List-I List-II
    1. Rapeseed oil

    2. Linseed oil

    3. Candlenut oil

    4. Safflower oil

    1. Carthamus tinctorius

    2. Linum usitatissimum

    3. Brassica juncea

    4. Aleurites moluccana

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  11. The quality of cotton is evaluated in terms of

    1. Length of fiber

    2. Count

    3. Weight

    4. Tensile strength

  12. Which one of the following groups of spices belongs to one family?

    1. Ferula asafoetida, Elettaria Cardamom, Syzygium aromaticum

    2. Trigonella foenum-graecum, Brassica competris, Cuminum cyminum

    3. Foeniculum vulgare, Ferula asafoetida, Carum copticum

    4. Syzygium aromaticum, Pimenta officinalis, Coriandrum sativum

  13. After the destruction of forests, what type of vegetation is expected to develop?

    1. Xerophytes vegetation

    2. Scrub vegetation

    3. Grassland vegetation

    4. Evergreen vegetation

  14. Match List I with List II and select the correct answer:

    List-I List-II
    1. Succession on rock

    2. Succession on sand

    3. Succession in a salt marsh

    4. Succession in water

    1. Litho sere

    2. Psammosere

    3. Halo sere

    4. Hydro sere

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  15. Which one of the following species is the nutritious fodder plant introduced by forest department?

    1. Cleome spinosa

    2. Dodonaea viscosa

    3. Stylosanthes hamata

    4. Derris elliptica