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TLS Online TPP Program

#Question id: 760

Which force can stabilize a DNA double-helix?

#SCPH05 I Biotechnology

  1. Hydrophobic bases are found in the interior of the helix where each base pair is stabilized by the same number of hydrogen bonds.

  2. Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.

  3. Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.

  4. Covalent base-stacking interactions can occur between adjacent bases within the same strand in the helix.

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TLS Online TPP Program

#Question id: 27798

#Research Methodology

Bibliography is :
TLS Online TPP Program

#Question id: 13055

#SCPH05 I Biotechnology

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.
Which of the following will provide least specific amplification in qPCR?
TLS Online TPP Program

#Question id: 14211

#SCPH05 I Biotechnology

Damkohler number (Da) used to define 
TLS Online TPP Program

#Question id: 11535

#SCPH06 I Botany

During IPA pathway in the biosynthesis of auxin using  following enzymes except_____
TLS Online TPP Program

#Question id: 12754

#SCPH28 | Zoology

A restriction enzyme cuts 1000bp away from the recognition site the restriction enzyme is most likely to be