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TLS Online TPP Program

#Question id: 7154

Cancer is believed to often arise from stem cells, rather than fully differentiated cells. Which of the following are consistent with this view?

#Unit 4. Cell Communication and Cell Signaling
  1. Stem cells are actively dividing and express few differentiated functions, so they may have fewer changes to undergo than do fully differentiated cells in becoming cancer cells.
  2. DNA replication is necessary for mutations to occur, and stem cells are replicating their DNA whereas differentiated cells are for the most part not replicating their DNA.
  3. Teratocarcinomas are tumors that arise from germ cells or embryonic stem (ES) cells, under certain circumstances, demonstrating that tumors can arise from stem cells without further mutation.
  4. All of the above are reasons that cancer cells may more readily arise from stem cells than from fully differentiated cells.
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TLS Online TPP Program

#Question id: 5743

#Unit 8. Inheritance Biology

Euploidy is
TLS Online TPP Program

#Question id: 18900

#Unit 13. Methods in Biology

Which statement is correct regarding ratio of half-life of radioactive material to its mean life?
TLS Online TPP Program

#Question id: 23296

#General Aptitude

Suppose your junior colleague expects some financial support from you on the occasion of his marriage. What decision will you take in this situation?
TLS Online TPP Program

#Question id: 10328

#Unit 9. Diversity of Life Forms

The term that is most appropriately associated with clade is
TLS Online TPP Program

#Question id: 2952

#Unit 2. Cellular Organization

Throughout interphase,.. .........  are synthesized at a relatively constant rate, whereas  ............ are synthesized only during the S phase.