The concentration of hydronium ions in a solution with a pH of 4 is how many times that of a solution with a pH of 2?
a. 2
b. 10
c. 100
d. 1,000
Ans: c. 100
You might also like to view...
Which of the following is the best explanation for why cholesterol decreases the permeability of biological membranes?
A) Cholesterol binds to the outside surface of a membrane, thus blocking the movement of solutes. B) Because cholesterol is amphipathic, it forms tiny vesicles that trap solutes. C) Because cholesterol is amphipathic, it fits in between the phospholipids and blocks diffusion through the membrane. D) Cholesterol has four rings in its structure that can sequester (trap) solutes.
The terms phototroph and chemotroph refer to an organism's source of
A. carbon. B. nitrogen. C. energy. D. electrons.
All epithelial cells in the inner lining of the large intestine that are heterozygous for an APC mutation ____
a. are able to control cell division with the second copy of the APC gene b. become cancerous c. require additional mutations in downstream genes to become cancerous d. cause the transition from polyps into colon cancer e. can partially escape control of the cell cycle and lead to the formation of clusters of polyps
The Cretaceous ended _____ million years ago
Fill in the blank(s) with correct word