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TLS Online TPP Program

#Question id: 2195

Which of the following statements about the mobility of membrane components is true?

#Unit 2. Cellular Organization

  1. Proteins and lipids move equally rapidly within the plane of the membrane.

  2. Lipids generally move more rapidly than proteins within the plane of the membrane.

  3. Proteins generally move more rapidly than lipids within the plane of the membrane.

  4. Lipids and proteins “flip-flop” between membrane leaflets more readily than they move within the plane of the membrane.

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TLS Online TPP Program

#Question id: 11838

#Unit 6. System Physiology – Plant

Which of the following ethylene receptors in Arabidopsis) have intrinsic histidine kinase activity, and this activity does not appear to play an essential role in signalling?
TLS Online TPP Program

#Question id: 11839

#Unit 6. System Physiology – Plant

Ethylene receptor are localized  in___
TLS Online TPP Program

#Question id: 11840

#Unit 1. Molecules and their Interaction Relevant to Biology

During an ethylene signalling pathway, what will have done  inside cytosol and nucleus . Given below some prediction about presence and absence of ethylene in column B match with column A

            COLUMN A

                                           COLUMN B

I-  In the presence of ethylene

a)  ETR1 signaling is repressed and CTR1 is inactive

II- In the absence of ethylene

b)  ETR1 activate CTR1, a Ser/Thr kinase

 

c)  CTR1 phosphorylates the C-terminal domain of EIN2

 

d)  The nonphosphorylated C terminus of EIN2 is cleaved by a protease

 

e)  Phosphorylation of EIN2 inhibits proteolytic cleavage

 

f)  EIN3 transcription factors are ubiquitinated and degraded in the nucleus by the 26S proteasome

 

g)  EIN3 initiates a transcriptional cascade by activating expression of ethylene-responsive genes, including ERF1 transcription factor, leading to ethylene responses

 
TLS Online TPP Program

#Question id: 11840

#Unit 6. System Physiology – Plant

During an ethylene signalling pathway, what will have done  inside cytosol and nucleus . Given below some prediction about presence and absence of ethylene in column B match with column A

            COLUMN A

                                           COLUMN B

I-  In the presence of ethylene

a)  ETR1 signaling is repressed and CTR1 is inactive

II- In the absence of ethylene

b)  ETR1 activate CTR1, a Ser/Thr kinase

 

c)  CTR1 phosphorylates the C-terminal domain of EIN2

 

d)  The nonphosphorylated C terminus of EIN2 is cleaved by a protease

 

e)  Phosphorylation of EIN2 inhibits proteolytic cleavage

 

f)  EIN3 transcription factors are ubiquitinated and degraded in the nucleus by the 26S proteasome

 

g)  EIN3 initiates a transcriptional cascade by activating expression of ethylene-responsive genes, including ERF1 transcription factor, leading to ethylene responses

 
TLS Online TPP Program

#Question id: 11841

#Unit 6. System Physiology – Plant

Multiple  isoforms of ethylene receptors may be present in a cell. The receptor is a dimer, held together by______X_________. Ethylene binds within the transmembrane domain, through________Y______, which is assembled into the ethylene receptors.
TLS Online TPP Program

#Question id: 11842

#Unit 6. System Physiology – Plant

What is the function of EIN3 in ethylene signalling pathway?