TLS Online TPP Program

#Question id: 11284


Which of the following could qualify as a top-down control on a grassland community?

#Unit 10. Ecological Principles
  1. limitation of plant biomass by rainfall amount

  2. influence of temperature on competition among plants
  3. influence of soil nutrients on the abundance of grasses versus wildflowers
  4. effect of grazing intensity by bison on plant species diversity
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TLS Online TPP Program

#Question id: 19806

#Unit 12. Applied Biology

Several approaches have been used to engineer plants for virus resistance, which are as follows:
(1) coat protein gene 
(2) ribozyme-mediated protection
(3) defective viral genome
(4) antisense RNA approach
Which of the following above statements are correct?

TLS Online TPP Program

#Question id: 798

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the structural properties of DNA with the respective types of DNA in which they are found.

               COLUMN – I                                             COLUMN – II

A.        Pitch per turn of helix                                     1. 45.6 angstrom                   

                                                                                      2. 24.6 angstrom                               

 3. 33.2 angstrom

B.        Helix packing diameter                                 1. 23.7 angstrom            

                                                                                     2. 18.4 angstrom            

3. 25.5 angstrom

C.        Major-groove proportions                            1. Flattened out on helix surface

                                                                                      2. Extremely narrow but very deep

 3. Wide and of intermediate depth

D.        Minor-groove proportions                            1. Very broad but shallow

                                                                                     2. Extremely narrow but very deep

                                                                                    3. Narrow and of intermediate depth

TLS Online TPP Program

#Question id: 23167

#Unit 13. Methods in Biology

A secondary antibody can be generated by immunizing a goat with antibody which segment that is common to all rabbit IgG antibodies called goat anti-rabbit.

TLS Online TPP Program

#Question id: 27552

#Unit 1. Molecules and their Interaction Relevant to Biology

Certain side-chain conformations are energetically favorable, these side chain confirmations are called as

TLS Online TPP Program

#Question id: 24145

#General Aptitude

UMBRAGE : OFFENSE