Collagen's molecular structure consists of
a. three polypeptide strands twisted together.
b. strands held together by hydrogen and covalent bonds.
c. strands that are high in proline, hydroxyproline, and glycine.
d. all of the above
e. none of the above answers is correct
Question 2
Which of the following is a false statement about pigments?
a. Myoglobin receives oxygen from the blood and stores it in the muscles.
b. Hemoglobin transports oxygen throughout the body and is found primarily in the bloodstream.
c. The higher the concentration of hemoglobin in raw meat, the more intense is its bright color.
d. Heavily exercised muscles have a higher demand for oxygen, so they are redder in color than the less exercised muscles.
e. The red color of meat increases as the animal ages.
Detailed aquaporin structure.
The structure of the Sun
Vertical Structure of the Atmosphere
The structure of sphingosine
Structure of a Tooth
A gene encodes an RNA, which can encode a polypeptide.