The mitochondrial inner membrane carries out the same function in cellular respiration as the ......... membrane of chloroplasts in photosynthesis. Which of the following correctly completes the sentence above?

The correct answer is c. 100,000. The pH scale is a logarithmic scale, which means that each change of one pH unit represents a tenfold change in the hydrogen-ion concentration. A pH 4 solution has a hydrogen-ion concentration that is 10^5 (or 100,000) times greater than that of a pH 9 solution.

A. 0.00001 is the hydrogen-ion concentration of a pH 9 solution as compared with a pH 4 solution.

B. 5 is the difference in pH units between a pH 4 solution and a pH 9 solution.

D. 50 is not the correct answer.

Nuclei. Genetic information describing the characteristics of an organism is found in the nuclei of its cells. The nucleus contains the organism's DNA, which carries the genetic information that determines its traits.

B. Membranes are structures that surround and enclose cells and organelles, but they do not contain genetic information.

C. Cilia are hair-like structures that protrude from the surface of some cells and are involved in movement, but they do not contain genetic information.

D. Ribosomes are organelles that are involved in protein synthesis, but they do not contain genetic information.