If 14C-labeled uridine triphosphate is added to the growth medium of cells, what macromolecules will be labeled?
A neutral atom must contain:
an equal number of protons and electrons
Which of the following correctly describes chemical equilibrium?
Forward and reverse reactions continue with no effect on the concentrations of the reactants and products.
What is the pH of a solution with a hydroxyl ion [OH-] concentration of 10-12 M?
If the pH of a solution is decreased from 9 to 8, it means that the:
concentration of H+ has increased tenfold (10X) and the concentration of OH- has decreased to one-tenth (1/10) what they were at pH 9.
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3- and a hydrogen ion (H+). Thus, H2CO3 ↔ HCO3- + H+
If the pH of the blood increases, one would expect:
a decrease in the concentration of H2CO3 and an increase in the concentration of HCO3-.
A carbon skeleton is covalently bonded to both an amino group and a carboxyl group. When placed in water it:
would function as both an acid and a base.
Humans can digest starch but not cellulose because:
humans have enzymes that can hydrolyze the α glycosidic linkages of starch but not the β glycosidic linkages of cellulose.
The label on a container of margarine lists “hydrogenated vegetable oil” as the major ingredient. What is the result of adding hydrogens to vegetable oil?
The hydrogenated vegetable oil stays solid at room temperature.