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.

TLS Online TPP Program

#Id: 7940

#Section 3: Genetics, Cellular and Molecular Biology

Once the SRP and its receptor have targeted a ribosome synthesizing a secretory protein to the ER membrane, the ribosome and nascent polypeptide chain are rapidly transferred to the translocon.

TLS Online TPP Program

#Id: 10379

#Section 2: General Biology

TLS Online TPP Program

#Id: 8630

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 10371

#Section 2: General Biology

A given MHC molecule can bind numerous different peptides, and some peptides can bind to several different MHC molecules. Because of this MHC molecule is often referred to as “promiscuous”.

TLS Online TPP Program

#Id: 8367

#Section 3: Genetics, Cellular and Molecular Biology

Myosin II

Two heads and assembles into bipolar filaments

Small and non-processive

Function- Contraction