Which statement best summarizes cellular respiration?

a. The chemical potential energy stored in organic molecules is converted to chemical energy that can be used to do the work of the cell.

b. Organic molecules, such as carbohydrates, are converted to chemical energy that can be used to do the work of the cell.

c. Chemical potential energy in the bonds of ADP is transferred to the chemical potential energy in the bonds of ATP.

The answer is (a). The chemical potential energy stored in organic molecules is converted to chemical energy that can be used to do the work of the cell.

Explanation:

Cellular respiration is the process by which organisms combine oxygen with foodstuff molecules while diverting the chemical energy in these substances into life-sustaining activities and removing carbon dioxide and water as waste products. Organisms that do not depend on oxygen degrade foodstuffs in a process called fermentation. The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, releasing energy because weak high-energy bond, especially in molecular oxygen,  are replaced by stronger bonds in the products.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.