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TLS Online TPP Program

#Question id: 759

The Watson and Crick structure of DNA refers to:

#SCPH01 Biochemistry

  1. The B form

  2. a right-handed helix with 10 base-pairs per turn

  3. The bases in the center, held together by hydrophobic interactions and phosphate bonding.

  4. a and b

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TLS Online TPP Program

#Question id: 3677

#SCPH06 I Botany

Which protein can catalyze the formation of phosphodiester bonds?
TLS Online TPP Program

#Question id: 11601

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

Gibberellin is an important plant hormone that regulates several aspects of plant growth and development. Some statements are given below in relation to  signalling pathways:

a) The binding of gibberellin (GA) to its receptor leads to the degradation of the DELLA repressor by the 26S proteasome

b) Gibberellin binds to the GID1 receptor and induces a conformational change in the N-terminal domain of the receptor, allowing the receptor to interact with the TVHYNP and DELLA domains of the DELLA repressor

c) The formation of the GID1-repressor complex promotes the interaction between the repressor and the E3 ubiquitin ligase SCFTIR1 complex, leading to the ubiquitination and degradation

d) The gibberellin receptor GIBBERELLIN INSENSITIVE DWARF 1 (GID1) also itself function as an F-box protein

Which one of the following is the incorrect statements about GA  signalling pathway;
TLS Online TPP Program

#Question id: 13057

#SCPH01 Biochemistry

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.
How primer concentration leads to decrease in PCR efficiency?
TLS Online TPP Program

#Question id: 660

#SCPH01 Biochemistry

Computers are used to advance the understanding of three dimensional protein structure by
TLS Online TPP Program

#Question id: 4580

#SCPH05 I Biotechnology

In modern terminology, diversity is understood to be a result of genetic variation. Sources of variation for evolution include all of the following except