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TLS Online TPP Program

#Id: 5909

A common feature of all DNA polymerases is that they cannot initiate synthesis of a chain of DNA de novo, but can only elongate a chain.

#Unit 3. Fundamental Processes #Mechanism of DNA synthesis in Prokaryotes #Part B Pointers
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TLS Online TPP Program

#Id: 9102

#Unit 4. Cell Communication and Cell Signaling

NO diffuses locally through tissues and activates an
intracellular NO receptor with guanylyl cyclase
activity in nearby smooth muscle cells
TLS Online TPP Program

#Id: 9103

#Unit 4. Cell Communication and Cell Signaling

Resulting rise in cGMP activates protein kinase G leading to relaxation of the muscle and vasodilation
TLS Online TPP Program

#Id: 9299

#Unit 4. Cell Communication and Cell Signaling

Rod cells sense light with the aid of a light-sensitive GPCR called rhodopsin.
TLS Online TPP Program

#Id: 9300

#Unit 4. Cell Communication and Cell Signaling

Rhodopsin has two components: 
Opsin protein, member of the GPCR A family 
11-cis-retinal light-absorbing pigment
TLS Online TPP Program

#Id: 9301

#Unit 4. Cell Communication and Cell Signaling
TLS Online TPP Program

#Id: 9302

#Unit 4. Cell Communication and Cell Signaling

11-cis-retinal covalently attached to the amino group of lysine residue 296 in the opsin protein