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TLS Online TPP Program

#Question id: 10414

Plants have evolved with multiple photoreceptors, Phytochrome is one of them. Which of the following statements is incorrect about these photoreceptors?

#Unit 6. System Physiology – Plant
  1. Phytochrome in the functionally active dimeric form with a molecular mass of about 250 kDa
  2. phytochrome chromophore is a linear tetrapyrrole and absorbed light called phytochromobilin
  3. Phytochromobilin is exported  to the cytosol where it autocatalytically attaches to the PHY apoprotein through a thioether linkage to a cysteine residue
  4. Phytochromobilin undergoes to the cis and trans isomerisation with its pyrrole ring around C-12 and C-13 after absorbing light
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TLS Online TPP Program

#Question id: 28395

#Unit 5. Developmental Biology

One of the genes activated by VegT protein encodes the Sox17 transcription factor , these sox17 transcription factor is critical for which functions?
TLS Online TPP Program

#Question id: 19053

#Unit 13. Methods in Biology

The principle on which thin layer chromatography is based is that the ____________
TLS Online TPP Program

#Question id: 3777

#Unit 3. Fundamental Processes

Which of the following types of cells are affected most by telomere shortening?
TLS Online TPP Program

#Question id: 4543

#Unit 3. Fundamental Processes

Control of the activator NtrC- In that case, the signal (low ammonia levels) induces a kinase that phosphorylates NtrC. This is type of

A. Indirect signaling

B. Direct signaling

C. Is an example of a signal transduction pathway
TLS Online TPP Program

#Question id: 30068

#Unit 7. System Physiology – Animal

Norepinephrine secreted by the sympathetic endings binds to β1 receptors, and the resulting: