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TLS Online TPP Program

#Question id: 28213

Specification of different mesodermal cell types in the frog Xenopus laevis by activin, a paracrine factor of the TGF-beta family. Which of the following observation is correct at the high concentration of activin?

#Unit 5. Developmental Biology
  1. activate the Xbra gene and instructed the cell to become dorsal-most structures
  2. activate the Xbra gene and instructed the cell to become muscle
  3. activate goosecoid gene and instructed the cell to become the frog’s dorsal-most structures
  4. activate goosecoid gene and instructed the cell to become the frog’s ventral-most structures
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TLS Online TPP Program

#Question id: 11331

#Unit 10. Ecological Principles

Based on the intermediate disturbance hypothesis, a community’s species diversity is increased by
TLS Online TPP Program

#Question id: 9200

#Unit 9. Diversity of Life Forms

During the inventory of bacterial genes present in the Sargasso Sea, a deep isolated area in the middle of the Atlantic Ocean, a research team concluded that at least 1,800 bacterial species were present. Based on what you might predict about the habitat structure of such an area, what kind of bacterial diversity would you expect to see in tropical coral reef waters?
TLS Online TPP Program

#Question id: 31361

#Unit 6. System Physiology – Plant

Nonphotochemical quenching in plants results in 
TLS Online TPP Program

#Question id: 19177

#Unit 13. Methods in Biology

Hot-start PCR is a modification of PCR. Which of the following is not corresponding to it?
TLS Online TPP Program

#Question id: 4064

#Unit 3. Fundamental Processes

Which of the following mutations can result in a reduction of β-galactosidase?