Botany Frequently Asked MCQs For Exam

Botany Frequently Asked MCQs For MBBS/BDS/NEET/Paramedicals/Applied Sciences:

BOTANY: Set-5

1. The viral infection cycle that will cause viral DNA to became integrated into bacterial DNA is called

      a. Lysogenic cycle                    b. Lysozyme cycle

      c. lytic cycle                               d. Lysel cycle

2. Entry of pollen tube through micropyle is

     a. Mesogamy     b. basigamy        c. Dichogamy         d. porogamy

3. The first acceptor of co₂ in c₄ pathway is

   a. RuBP carboxylate   b. PEP carboxylase   c. RuBP oxygenase   d. RUBP       carboxylase

4. Transportation of food in higher plants take place through

   a. Tracheids                      b. Transfussion tissue

    c. companion cells        d. sieve elements

5. Glycosylation is carried out by :

  a. mitochondria      b. peroxisome       c. Endoplasmic reticulum    d. ribosomes

6. which is edible fungus

   a. penicillium    b. Rhizopus      c. Mucor       d. Agaricus

7. The concept of ecosystem was given by

   a. E. P  Odum                    b. Carl Linnaeus

   c. Charles Darwin            d. A. G Tanslay

8. Ability of a plant or animal cell to repeadly divide and differentiate into a complete organism is

  a. cloning       b. Breeding      c. cellular totipotancy      d. mitosis

9. sexual reproduction in spirogyra is

   a. Isogamous    b. oogamous    c. Anisogamous      d. heterogamous

10. cell becomes turgid when placed in

    a.Hypertonic solution

   b. Isotonic solution

   c. In air

   d. Hypotonic

11. Ascent of sap is due to

    a. osmosis            b. Diffusion              c. Transpiration   d. guttation

12. Pneumatophores is a modified

     a. root     b. stem     c. Leaf     d. Thallus

                                                           

Hints and Solution

1. a. lysogenic cycle : viral infection cycle in which genetic material DNA of virus is incorporated with the host cell DNA

  Lytic cycle: viral infection cycle in which virus particle divided rapidly and come out of the host cell by rupturing host cell thus killing if eg coliphase T₂ and T₄

2. d. misogamy : entry of pollen tube through integument

        Basigamy : entry of pollen tube through the basal part of ovule i.e. chalaza

        Dichogamy : maturation of sex at different interval of the time

        Porogamy : entry of pollen tube through michropile ( kmost common )

3. b. first stable product of c4 plant is oxalo-Acetic acid (OAA)

        First stable product of c3 plants is 3- phospoglyceric acid

        First stable carbohydrate of c3 plants is 3- PGA( phospogleceric acid )

4. d. Transportation of food material is done by phloem and in higher plant transportation is done through sieve elements

Campenion cells are only found in angiosperm

5. c. Glycosidation and glycosylation are first started in ER

        Membrane factory of the cell is ER

        Cell wall formation is done by GB

6. d. Agaricus belongs to Basidomycetes

7. a. concept of bianomial nomencleature : Linnaeus

   Origin of species : charls Darwin

     Concept of ecology : Reiter

8. c. progeny of single plant obtained by vegetative propagation is called clone

9. a. sexual reproduction in mucor is also isogamous

     Sexual reproduction in plasmodium is anisogamous

10. d. isotonic solution : when the concentration of the solution is equal to the cell sap

     Hypotonic solution : concentration of the solution is lower than the cell sap

     Hypertonic solution : concentration of the solution is higher than that of cell     sap

11. c. path of ascent of sap in gymnosperm is trachids

12. a. pneumatopores are also called respiratory or brearhing root and present in mangrove plants

They grow vertically upward showing negative geotropism