RNA molecules that act as enzymes to catalyze specific biochemical reactions are
A) RNases.
B) splice acceptors.
C) ribozymes.
D) tRNAs.
E) restriction enzymes.
C) ribozymes.
RNA molecules that act as enzymes to catalyze specific biochemical reactions are ribozymes.
You might also like to view...
AMP-activated protein kinase (AMPK) is an enzyme that is activated by high levels of AMP in cells. If levels of AMP are high in cells, that means that levels of ATP are low. Once active, AMPK activates catabolic pathways and inhibits anabolic pathways in the cell. Why do you think that is the case? Choose the answer that best explains the role of AMPK
A. High levels of AMP indicate that there is a high amount of energy stored in the cell, thus activating catabolic pathways and inhibiting anabolic pathways are mechanisms to use stored energy. B. By inhibiting anabolic pathways, AMPK provides a mechanism to generate heat for the cell, which is important if AMP levels are high in the cell. C. By activating catabolic pathways, AMPK provides a mechanism to activate exergonic pathways, which is important if AMP levels are high in the cell. D. Activating catabolic pathways and inhibiting anabolic pathways will ultimately lead to higher consumption of ATP, which is important if AMP levels are high in the cell.
The plant alkaloid ricin is nontoxic inside castor beans, but becomes active when digested by an animal. The toxic form of ricin kills by
A. inactivating the animal's immune system. B. over stimulating the animal's heart rate. C. inactivating ribosomes needed for translation. D. binding to RNA polymerase. E. releasing cyanide.
A collection of similarly specialized cells and any extracellular material they secrete and maintain describes
a. an organ. b. a system. c. a tissue. d. organelles.
It is now possible for parents to bank the umbilical cord blood of their children; the cells in the cord would then be available for use later in the life of the child to treat a genetic disorder or cancer, should it develop
Indicate whether the statement is true or false