Competitive Exams: Botany MCQs (Practice-Test 55 of 104)

  1. In cell division, Kinetochore helps in

    1. The formation synaptoriemal complex

    2. Condensing the chromatin

    3. Attaching chromosome with spindle fibers

    4. Cytokines is

  2. In the meiotic process, metaphase I differs significantly from metaphase II by the

    1. Arrangement of chromosomes at equatorial plane

    2. Lack of centromeric division

    3. Orientation towards opposite poles

    4. Attachment of spindle fibers to the centromeric positions

  3. Consider the following statements:

    1. Point mutation is a process by which new alleles of a gene are produced

    2. Ultraviolet rays are a strongly ionizing radiation

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  4. A plant with four heterogonous pairs of chromosomes having Aa, Bb, Cc, Dd is self fertilized, the resulting genotype with Aa Bb Cc Dd genes occur according to which one of the following frequencies?

    1. 1/16

    2. 1/64

    3. 1/256

    4. 1/1024

  5. In the process of a forestation to check the desertification, which of the following groups of plants would be best used?

    1. Eucalyptus sp, Butea frondosa Ficus religiosa

    2. Delonix regia, Ziziphus sp, Tectona grandis

    3. Prossopis cineraria, Acacia nilotica, Acacia tortilis

    4. Polyalthia Longifolia Azadirachta indica, Aihizzia lebbek

  6. Which one of the following plant communities is represented by tropical Savanna?

    1. Shorea-Terminalia-Butea

    2. Juniper-Abies-Betula

    3. Dipterocarpus-Tectona

    4. Panicum-Andropogon-Acacia

  7. In India Tropial Wet Evergreen forests are restricted mainly to

    1. Malabar coast and Assam

    2. Malabar coast and Western Himalaya

    3. Coromandal coast Punjab

    4. Coromandal coast and Nilgiri

  8. Which one of the following is commonly found in the Alpine Zone of the Himalaya?

    1. Pinus roxburghii

    2. Juniperus sp

    3. Quercus sp

    4. Cerdrus sp

  9. Which one of the following is commonly found in the Alpine Zone of the Himalya?

    1. Atropha Belladona

    2. Cathranthus roseus

    3. Papaver sominferum

    4. Rauwolfia sepentina

  10. Which one of the following is the Hotspot widespread type of forest in India?

    1. Tropical wet evergreen

    2. Thorn scrub

    3. Mangrove

    4. Tropical dry deciduous

  11. Which one of the following regions is identified as a ‘hot spot’ of biodiversity in the world?

    1. Cental Himalayas

    2. Eastern Himalayas

    3. Eastern Ghats

    4. Western Himalayas

  12. Which one of the following is associated with denitrification?

    1. Rhizobium

    2. Pseudomonas

    3. Nitrobacter

    4. Azotobacter

  13. Coralloid roots of cycas are normally inhabited by

    1. Blue green algae

    2. Green algae

    3. Nitrogen fixing bacteria

    4. Sulphur bacteria

  14. In vitro production of disease-free plants requires culturing of

    1. Anther

    2. Shoot meristem

    3. Protoplast

    4. Leaf tip

  15. Which one of the following enzyme combinations yields protoplasts satisfactorily?

    1. Ligninase-cellulase-lipase

    2. Cellulase-lipase-hemicelulase

    3. Cellulase-hemiceHulase-ligninase

    4. Pectinase-cel luase-hemicellulase