R-Smads comprising: 

An N-terminal MH1 domain

A central proline-rich linker 

A C-terminal MH2 domain

TLS Online TPP Program

#Id: 7736

#XL - Q Biochemistry

The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

TLS Online TPP Program

#Id: 7735

#XL - Q Biochemistry

The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

TLS Online TPP Program

#Id: 7734

#XL - Q Biochemistry

The number of electrons in a neutral atom is equal to the number of protons.

TLS Online TPP Program

#Id: 7733

#XL - Q Biochemistry

Atoms are made of the same three basic particles: protons, neutrons, and electrons.

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.

TLS Online TPP Program

#Id: 8131

#XL - Q Biochemistry

In most mammalian tissues, ubiquinone (also called coenzyme Q) has 10 isoprene units.

Dolichols of animals have 17 to 21 isoprene units (85 to 105 carbon atoms), bacterial dolichols have 11, and those of plants and fungi have 14 to 24.