Competitive Exams: Botany MCQs (Practice-Test 84 of 104)

  1. Polymerase chain reaction technique is used for

    1. DNA amplification

    2. screening gene libraries

    3. synthesis of polymerases

    4. DNA sequencing

  2. Match List I with List II and select the correct answer

    List-I List-II
    1. Gene libraries

    2. Single cell protein (SCP)

    3. Agriculture cereal crop

    4. C-DNA

    1. Production of food

    2. Nif genes

    3. Chromosome mapping

    4. Gene bank

    • A
    • B
    • C
    • D
      • 2
      • 3
      • 1
      • 4
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 3
      • 3
      • 2
      • 1
      • 4
  3. Which one of the following organisms is advantageously associated with single-cell protein production technology?

    1. Agro bacterium

    2. Spirulina

    3. Saccharomyces

    4. Acetabularia

  4. Match List I with List H and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Aerenchyma

    2. Crustose lichen

    3. Vivipary

    4. Discilimax

    1. Lithophyte

    2. Mangrove

    3. Disturbed succession

    4. Hythilla

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 2
      • 3
      • 2
      • 3
      • 1
      • 4
      • 4
      • 1
      • 3
      • 2
      • 1
      • 4
      • 2
      • 3
  5. Disappearance of Salmon fish from water bodies indicates excess of

    1. Zinc in water

    2. Mercury in water

    3. Fluoride in water

    4. Phosphorus in water

  6. In the hills, the soil erosion takes place due to rapid flow of rain water. It can be most effectively controlled by

    1. Channel sing the water

    2. Terrace cultivation

    3. Jhum cultivation

    4. Building dikes

    • Assertion (A): Leaves develop chlorosis in the absence of iron.
    • Reason (R): Iron is a constituent of

    Chlorophyll.

    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but P is false

    4. A is false but R is true

    • Assertion (A): Germinating seeds which store fats as reserve food material are very rich in glyoxysomes.
    • Reason (R): Glyoxysomes are required for the conversion of fats into sugar to provide energy to the germinating seed.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but P is false

    4. A is false but R is true

    • Assertion (A): Dichogamy refers to maturation of male and female sex organs at different times.
    • Reason (R): This is a safeguard against cross-pollination.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but P is false

    4. A is false but R is true

    • Assertion (A): In F2 population, a dysgenic trait segregates according to 9: 3: 3 1 ratio.
    • Reason (R): Deviations from the theoretical segregating ratio occur due to linkage between the controlling genes.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but P is false

    4. A is false but R is true

    • Assertion (A): Each cell is tot potent.
    • Reason (R): This is implicit in the cell theory expressed by Schwann.
    1. Both A and Rare true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but P is false

    4. A is false but R is true

  7. The geological age of a rock is determined by

    1. The fossil flora and fauna

    2. Chemical composition of the rocks

    3. Radiometric dating

    4. Spectroscopic data

  8. Which one of the following is the earliest land plant?

    1. Rhynia

    2. Homea

    3. Cordite's

    4. Cook Sonia

  9. Match List I (Plant groups) with List II (Botanists) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Algae

    2. Hepatics

    3. Fossial gymnosperms

    4. Angiosperms

    1. Kashyap

    2. Fr. Santapau

    3. lyenger

    4. Sahni

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 4
      • 2
      • 2
      • 4
      • 1
      • 3
      • 3
      • 4
      • 1
      • 2
      • 2
      • 1
      • 4
      • 3
  10. Dendrochronology is the

    1. Study of seasonal activity of the cranium

    2. Determination of age of a tree by counting the annual rings

    3. Determination of the nature of the annual rings

    4. Study of seasonal behavior of plants governed by endogenous rhythm