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TLS Online TPP Program

#Question id: 1242

Rhodopsin, a light-sensitive GPCR whose role in vision is dependent on its phosphorylation status, is influenced in part by the protein arrestin.  Which of the following is TRUE with regard to rhodopsin and vision?

#Unit 4. Cell Communication and Cell Signaling

  1. Rhodopsin phosphatase increases the degree of rhodopsin phosphorylation.

  2. Arrestin binds to the completely phosphorylated opsin to inhibit signaling.

  3. Rhodopsin activation promotes the opening of a cGMP-gated ion channel.

  4. Arrestin binds to the completely dephosphorylated opsin to inhibit signaling.

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TLS Online TPP Program

#Question id: 28089

#Unit 6. System Physiology – Plant

The following statement is related to the phenomenon of Cyclic electron transport   
(a) Produces only ATP as a product without net production of NADPH
(b) Produces only NADPH as a product without net production of ATP 
(c) This phenomenon is done by NDH and PGRL dependent mechanism
(d) This phenomenon is done by NDH and PGRL independent mechanism
Which of the following is correct
TLS Online TPP Program

#Question id: 28090

#Unit 6. System Physiology – Plant

The NDH pathway is especially prominent during oxidative stress.  The second pathway involves a ferredoxin‐quinone oxidoreductase that is sensitive to
TLS Online TPP Program

#Question id: 28091

#Unit 6. System Physiology – Plant

Inhibitory agents are given along with their inhibitory system/process 
(a) DCMU -  an inhibitor of PS I 
(b) DCMU -  an inhibitor of PSII 
(c) DBMIB -  an inhibitor of the Cyt b6 f complex
(d) Paraquat -  an inhibitor of PSI
(e) Paraquat -  an inhibitor of PSII
Which of the following is correctly matched
TLS Online TPP Program

#Question id: 28092

#Unit 6. System Physiology – Plant

Component along with their thylakoids percentage in appressed and stroma exposed are given
Match them correctly
TLS Online TPP Program

#Question id: 28093

#Unit 6. System Physiology – Plant

Different component are oriented in different manner     
(a) Photosystem II is located predominantly in the stacked regions of the thylakoid membrane
(b) Photosystem I is located predominantly in the stacked regions of the thylakoid membrane
(c) photosystem II and ATP synthase are found in the unstacked regions protruding into the stroma 
(d) photosystem I and ATP synthase are found in the unstacked regions protruding into the stroma
Which of the following is correct
TLS Online TPP Program

#Question id: 28094

#Unit 6. System Physiology – Plant

Which of the following involved in the phosphorylation of LHCII complex when the pool of plastoquinone is in a highly reduced state