TLS Online TPP Program

#Question id: 12696


The following is a schematic representation of region of the chromosome of fly along with extent of six deletions (Del 1 to Del 6); 
When flies homozygous for the recessive mutations are crossed with flies heterozygous for the deletions, the following results are obtained, in which "m" represents a mutant phenotype and a plus sign (+) represents the wild type. On the basis of these data, determine the relative order of the seven mutant eenes on the chromosome. 

#Unit 8. Inheritance Biology
  1. a-c-d-b-e-f
  2. d-e-c-a-b-f
  3. f-a-c-e-d-b
  4. f-a-b-e-c-d
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TLS Online TPP Program

#Question id: 176

#Unit 1. Molecules and their Interaction Relevant to Biology

A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly. What is the net charge of the molecule at pH 3

TLS Online TPP Program

#Question id: 18736

#Unit 13. Methods in Biology

Ligation enzymes are used for ligating newly synthesized okazaki fragments. What holds true for okazaki fragments?

TLS Online TPP Program

#Question id: 13055

#Unit 13. Methods in Biology

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: 77

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the pairs of molecular structures shown depict enantiomers (enantiomeric forms) of the same molecule?

TLS Online TPP Program

#Question id: 32228

#Unit 2. Cellular Organization

Which of the following statements are INCORRECT regarding coated vesicle and vesicle transport?