12th Standard CBSE - Biology - Strategies for Enhancement in Food Production

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Question - 1

In hybridization, the haploids combine the advantages of

  • A Recombination
  • B Segregation
  • C Fixation
  • D All of them

Question - 2

Which one of the following is not s secondary metabolite?

  • A Resins
  • B Essential oils
  • C Amino acids
  • D Tannins

Question - 3

Which one of the following substance is responsible for callus formation

  • A 2,4-D
  • B NAA
  • C BAP
  • D PEG

Question - 4

Who gave the idea that every plant cell is totipotent

  • A P.R White
  • B E.C Cocking
  • C F.C Staward
  • D G.Haberlandt

Question - 5

Name the cytologist who cultured anthers for the first time.

  • A Hannig
  • B Shima Kura
  • C Sumuki
  • D Yabuta

Question - 6

In order to obtain disease-free plants through tissue culture techniques, the best method is

  • A Embryo rescue
  • B Anther culture
  • C Protoplast culture 
  • D Meristem culture

Question - 7

The best way to obtain bacteria and viruses free plants through tissue culture

  • A Micropropagation
  • B Seed germination after gamma-irradiation
  • C Stem or Shoot tip culture
  • D Seed germination under aseptic conditions

Question - 8

A major application of embryo culture is

  • A Production of embryoids
  • B Overcoming hybridization barriers
  • C Induction of somaclonal variations
  • D Clonal propagation

Question - 9

The  substance used in the tissue culture medium for induction of shoots in callus is

  • A ABA
  • B GA3
  • C IAA
  • D Kionetic

Question - 10

In tissue cultural medium, the embryoids formed from pollen grains is due to

  • A Cellular totipotency
  • B Organogenesis
  • C Double fertilization
  • D Test tube culture