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TLS Online TPP Program

#Question id: 798

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

#SCPH05 I Biotechnology

  1. A DNA – A-2; B-3; C-2; D-1

  2. B DNA – A-3; B-2; C-3; D-3

  3. Z DNA – A-1; B-2; C-1; D-2

  4. A DNA – A-2; B-2; C-3; D-2

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TLS Online TPP Program

#Question id: 5350

#SCPH28 | Zoology

Which of the following most probable mode of genetic disorder?
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#Question id: 2062

#SCPH05 I Biotechnology

Which of the following types of molecules lack hydrophilic domains?
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#Question id: 1695

#I Life Science/ Life Sciences Group – I-V

The processed peptide binding to the MHC class I groove:
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#Question id: 13060

#SCPH28 | Zoology

Precision will be reduced, but yield will be increased
Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.
In blue white screening insertional activation of Beta-D-galactosidase will give rise to
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#Question id: 669

#SCPH28 | Zoology

Ramachandran determined the ʺallowedʺ values of the phi and psi angles primarily by considering ________.