AP activates a  voltage gated Ca2+ channel in the T-tubule membrane, it triggers the opening of a Ca2+ -release channel in the closely associated SR membrane

TLS Online TPP Program

#Id: 8173

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 8174

#XL - Q Biochemistry

Sets of SNARE Proteins responsible for the eventual fusion of a vesicle with the target membrane:

Vesicle-specific membrane protein, v-SNARE

Target membrane contains t-SNARE

TLS Online TPP Program

#Id: 8175

#XL - Q Biochemistry

SNARE-mediated fusion occurs during exocytosis of secreted proteins. In this case, 

v-SNARE, are VAMP 

t-SNAREs are syntaxin & SNAP-25

TLS Online TPP Program

#Id: 8176

#XL - Q Biochemistry

SNARE complex is disassembled by ATP-dependent reaction mediated by cytosolic proteins, NSF & α-SNAP

TLS Online TPP Program

#Id: 8177

#XL - Q Biochemistry

In plant cells,

Golgi apparatus serves as the site at which the complex polysaccharides of the cell wall (pectin & hemicellulose) are synthesized.

TLS Online TPP Program

#Id: 8132

#XL - Q Biochemistry

Lipids as pigments in plants and bird feathers.

Birds acquire the pigments that color their feathers red or yellow by eating plant materials that contain carotenoid pigments, such as canthaxanthin and zeaxanthin.

The differences in pigmentation between male and female birds are the result of differences in intestinal uptake and processing of carotenoids.