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TLS Online TPP Program

#Question id: 675

Which statement is not true about an α-helix?

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

  1. It is usually right-handed.

  2. It is a type of secondary structure.

  3. It frequently contains proline residues.  

  4. It is stabilized by hydrogen bonding.

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TLS Online TPP Program

#Question id: 786

#SCPH06 I Botany

A = 27%                    G = 30%   T = 21%              C = 22%

If the genome of a newly isolated virus displays the base composition above, the virus most likely consists of ______.
TLS Online TPP Program

#Question id: 792

#SCPH06 I Botany

Which arm of the tRNA can act as a structural recognition feature?
TLS Online TPP Program

#Question id: 13059

#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.
Efficiency during ligation of blunt ended insert and vector cannot be cannot be enhanced by means of…..
TLS Online TPP Program

#Question id: 10524

#SCPH05 I Biotechnology

Members of the Poaceae family, which includes all of the cereal crops, use benzoxazinoids, these alkaloids shows;

a) Alkaloids are derived from the tryptophan as constitutively produced defensive secondary metabolites

b) These benzoxazinoids such as DIBOA and its derivative DIMBOA are usually stored in the peroxisome

c) Upon damage, the inactive glycosides are hydrolyzed, generating glucosinolate, which are toxic not only to insect herbivores but also against pathogens

d) DIBOA and DIMBOA perform insecticidal and pesticidal activities

e) It can be inactivated by hydroxylation and N-glycosylation reactions

Which of the following combination is correct about benzoxazinoids alkaloids?
TLS Online TPP Program

#Question id: 6984

#SCPH06 I Botany

Which of the following genes is unlikely to be involved in preaxial polydactyly in mice?