TLS Online TPP Program

#Question id: 346


The partial negative charge in a molecule of water occurs because ________.

#Section 2: General Biology
  1. the oxygen atom donates an electron to each of the hydrogen atoms

  2. the electrons shared between the oxygen and hydrogen atoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus

  3. the oxygen atom has two pairs of electrons in its valence shell that are not neutralized by hydrogen atoms

  4. one of the hydrogen atoms donates an electron to the oxygen atom

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TLS Online TPP Program

#Question id: 15871

#Section 6: Plant, Animal and Microbial Biotechnology

Various sterilization techniques used in plant tissue culture work;

           Sterilization technique

 

          Materials sterilized

     A) Dry heat

i) Media, culture vessels, other glass plasticwarc, contaminated cultures

 

      B) Autoclaving

ii) Heat labile compounds like GA3, ABA, zeatin, urea,·enzymes, etc.

 

      C) Surface sterilization

iii) Empty glassware, instruments like scalpels, forceps, needles

 

     D) Liquid (membrane filter of 

       0.45 μm or smaller pore size)

iv) All plant materials to be cultured

 

 

TLS Online TPP Program

#Question id: 15872

#Section 6: Plant, Animal and Microbial Biotechnology

For optimum callus growth, the given some following vitamins are required, except;

TLS Online TPP Program

#Question id: 15873

#Section 6: Plant, Animal and Microbial Biotechnology

Which is the most commonly used carbon source, for all cultured plant materials, including even green shoots.

TLS Online TPP Program

#Question id: 15874

#Section 6: Plant, Animal and Microbial Biotechnology

Callus culture show numerical chromosomal changes such as;

TLS Online TPP Program

#Question id: 15875

#Section 6: Plant, Animal and Microbial Biotechnology

Suspension cultures show both numerical and structural chromosomal changes such as;

TLS Online TPP Program

#Question id: 15876

#Section 6: Plant, Animal and Microbial Biotechnology

The following growth regulators (GRs)- auxins, cytokinins, ABA and GA3 are used in plant tissue culture, The common range of concentrations used are as follows:
GROWTH REGULATOR(GRs)                                     CONCENTERATION
A) AUXIN                                                                       i) 0.1-3 mg/L
B) GA3                                                                          ii) 0.2 mg/L
C) CYTOKININ                                                           iii) 0.1-1 mg/L
D) ABA