TLS Online TPP Program

#Id: 10299

#Section 2: General Biology

Lineage commitment

TLS Online TPP Program

#Id: 8132

#Section 2: General Biology

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: 7751

#Section 2: General Biology

Ranks the following in increasing atomic radius

S, Mg, Al

S: 16-10 +6

Mg: 12-10 = +2

Al: 13-10 +3

So: S < AlMg

TLS Online TPP Program

#Id: 9267

#Section 2: General Biology

Diazotrophs are able to catalyze the enzymatic reduction of this compound to ammonia (NH3) using the enzyme nitrogenase

TLS Online TPP Program

#Id: 8396

#Section 3: Genetics, Cellular and Molecular Biology

Each sarcomere contains two major types of filaments: 

Thick filaments (myosin II)

Thin filaments (actin and associated proteins)