γ-secretase complex contains 

Presenilin 1 (actual protease), aph-1, pen-2, & nicastrin

TLS Online TPP Program

#Id: 9102

#XL - T Zoology

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

#XL - T Zoology

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

TLS Online TPP Program

#Id: 9299

#XL - T Zoology

Rod cells sense light with the aid of a light-sensitive GPCR called rhodopsin.

TLS Online TPP Program

#Id: 9300

#XL - T Zoology

Rhodopsin has two components: 

Opsin protein, member of the GPCR A family 

11-cis-retinal light-absorbing pigment

TLS Online TPP Program

#Id: 9301

#XL - T Zoology

TLS Online TPP Program

#Id: 9302

#XL - T Zoology

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