A scientist identifies a cell line derived from muscle with reduced expression of several muscle-specific proteins including ?-actin and myosin
Further investigation shows that while mRNA specific to these proteins is transcribed and polyadenylated at normal rates, the half-life of the mRNAs is significantly lower. What would be a likely explanation?
A. There is a mutation in RNA polymerase II.
B. There is an increase in RNA-editing terminal uridylyltransferase (TUTase) activity.
C. There is amutation in poly(A) binding protein (PABP).
D. There is amutation in polyadenylate polymerase (PAP).
E.There is an increase in number of processing bodies.
C
You might also like to view...
Assuming that aerobic metabolism starts with glucose as its fuel, approximately _____% of the energy of the starting molecules will be captured in a useful form. The remaining energy will be converted to _____ and will be either lost or used to _____
A. 42; heat; warm the animal B. 42; electricity; keep the circulatory system functioning C. 58; heat; warm the animal D. 75; light; carry out photosynthesis E. 42; light; carry out photosynthesis
The Krebs cycle takes place in the
a. ribosomes. b. cytoplasm. c. nucleus. d. mitochondria. e. chloroplasts.
About what percent of all the water moving into a
leaf is stored or used in metabolism? a. 0 b. 2 c. 10 d. 70 e. 90
The specific conditions a species needs in order to survive and reproduce is a(n) ____________________ . Fill in the blank(s) with the appropriate word(s)