Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 43034
TLS Online TPP Program

#Question id: 13048

In HAT selection surviving cells synthesise nucleotides by means of:

#SCPH05 I Biotechnology
  1. salvage pathway
  2. de novo pathway
  3. None of these
  4. both salvage and de novo pathway
More Questions
TLS Online TPP Program

#Question id: 53

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

Calculate the number of times the DNA of a modern E. coli cell has been copied accurately since its earliest bacterial precursor cell arose about 3.5 billion years ago. Assume for simplicity that over this time period, E. coli has undergone, on average, one cell division every 12 hours (this is an overestimate for modern bacteria, but probably an underestimate for ancient bacteria).
TLS Online TPP Program

#Question id: 19125

#SCPH06 I Botany

Which nature of interaction between the analytes and the biological material used in biosensor?
1. The analytes may be converted into a new chemical molecule (by enzymes)
2. The analytes may simply bind to the biological material present on the biosensor 
3. The analytes may be converted into dimer molecule 
Which of the following above statements are correct?
TLS Online TPP Program

#Question id: 3259

#SCPH28 | Zoology

Different type of evolution leads to group of taxon in following three manners

A- group of taxon whose member have descended from common ancestor

B- when two lineages convergently  evolve similar character states form  groups that are recognized by pheneticists

c. taxon that include most recent ancestor but not all of its descendent
TLS Online TPP Program

#Question id: 30

#SCPH01 Biochemistry

Amongst the following chemical elements that are essential to organisms, which of the following set of elements have an atomic number above that of selenium?
TLS Online TPP Program

#Question id: 1412

#SCPH06 I Botany

Which technique is the best for identifying which genes are upregulated and which are downregulated when cancer cells in culture are treated with taxol?