TLS Online TPP Program

#Question id: 23187


Which of the following is true about photoactivable fluorescent proteins?

#Unit 13. Methods in Biology
  1. Photoactivable fluorescent protein can be switched on by x-rays.
  2. Variant of fluorescent molecule that can be photoactivated by a wavelength different from its excitation wavelength
  3. Variant of fluorescent molecule that can be photoactivated by a same wavelength 
  4. Pin hole can be used to switch on the fluorescence of the variant molecule
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TLS Online TPP Program

#Question id: 12212

#Unit 7. System Physiology – Animal

 A 71-year-old man with upper abdominal pain and blood in the stool takes NSAIDS for the pain and washes it down with whiskey. Pentagastrin administration produced lower than predicted levels of gastric acid secretion. Secretion of which of the following substances is most likely to be diminished in this patient with gastritis?

TLS Online TPP Program

#Question id: 15670

#Unit 8. Inheritance Biology

A researcher would like to map the location of galE and trpA genes in a new species of bacterium that appears to be closely related to E. coli. He decides to use cotransduction, and generates appropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?

TLS Online TPP Program

#Question id: 20331

#Unit 4. Cell Communication and Cell Signaling

LuxR is analogous to certain eukaryotic regulatory proteins, such as

TLS Online TPP Program

#Question id: 15706

#Unit 12. Applied Biology

Growth regulators which cause cell division, cell differentiation, shoot differentiation

TLS Online TPP Program

#Question id: 11653

#Unit 10. Ecological Principles

Given some characteristics of the climax community

i) Tolerate its own reactions

ii) Tends to become mesic

iii) Less stable

iv) Complex stratification

v) Simple food web

vi) Less mutualism

vii) Gross production is equals to community respiration

viii) Net community production is zero

Which of the following combination shows the characteristics of climax community?