TLS Online TPP Program

#Question id: 13065


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.
Agglutination of antigens by utilising specific antibodies can only occur, if

#SCPH06 I Botany
  1. The concentration of Ag or Ab is at point of equivalence
  2. At point of equivalence or Ab in excess
  3. At point of equivalence or Ag in excess
  4. All the above
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TLS Online TPP Program

#Question id: 10352

#SCPH06 I Botany

which of the following amino acid that participates in the malate–aspartate shuttle to transfer reducing equivalents from the mitochondrion and chloroplast into the cytosol?

TLS Online TPP Program

#Question id: 9172

#SCPH06 I Botany

Two plant species live in the same biome but on different continents. Although the two species are not at all closely related, they may appear quite similar as a result of ________.

TLS Online TPP Program

#Question id: 13056

#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.
 Which of the following is true for traditional and real time PCR?

TLS Online TPP Program

#Question id: 22956

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

Individual and overlapping expression of homeotic genes in adjacent whorl of a flower determine the pattern of floral organ development. In an Arabidopsis mutant, floral organs are distributed as follows
WHORL 1 Sepal
WHORL 2 Petal
WHORL 3 Petal
WHORL 4 Sepal
Loss of function mutation in which one of the following genes would have caused the above pattern of floral organs development 

TLS Online TPP Program

#Question id: 3614

#SCPH12 I Genetics

A gene showing codominance–