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TLS Online TPP Program

#Question id: 7135

Recently, it was reported that adult, differentiated cells can be made to behave as pluripotent stem cells by the introduction of a few genes, one of which was Oct4. What was the rationale for this experiment?

#Unit 5. Developmental Biology
  1. Oct4 expression is one of the requisites for the maintenance of pluripotent embryonic stem cells in culture.
  2. the Oct4 gene produces a cell-cell signaling protein that is used by stem cells to stimulate cell division
  3. Oct4 is only expressed in embryonic stem cells, and so its expression automatically reverses any differentiation that may have gone on in a cell
  4. the Oct4 gene is lost from differentiated cells through a genomic rearrangement, and its reintroduction reverses that rearrangement and hence differentiation
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TLS Online TPP Program

#Question id: 22955

#Unit 5. Developmental Biology

Based On ABC model during flower development, loss of class A activity results the formation of only stamen and carpel. Which of the flowering floral organs identity genes controls the class  A activity ?
TLS Online TPP Program

#Question id: 11651

#Unit 10. Ecological Principles

Succession on a newly exposed site that was not previously occupied by soil and vegetation refers to
TLS Online TPP Program

#Question id: 29544

#Unit 6. System Physiology – Plant

All of these R genes encode NBS–LRR receptors which confers certain resistance in different organism

Match the R gene with their respective organism
TLS Online TPP Program

#Question id: 1328

#Unit 4. Cell Communication and Cell Signaling

Which of the following is the odd one out?
TLS Online TPP Program

#Question id: 5596

#Unit 5. Developmental Biology

The functional maturation of sperm after they have been deposited in the female reproductive tract, known as