A) Briefly explain what happened to old stem and progenitor cells in a young systemic environment.
B) Which substance is the most common in cells?
a. carbohydrates
b. salts and minerals
c. proteins
d. fats
e. water
C) Describe how an enzyme may change the transcription patterns of a cell by adding chemical groups to histone proteins. What is this called?
D) Acetyl L-Carnitine/Alpha lipoic acid are ____________ that are produced naturally by the body in _______
a. Amino acids, large amounts
b. Antioxidants, small amounts
c. Toxins, abundance
d. ROS, trace amounts
E) Most genes that determine lifespan in C. elegans are directly in DNA repair. True or False