Question

Which statement describes a reason that the output of molecules of cellular respiration are different from the input molecules?

Answer 1

Answer:

The bonds between the atoms in the input molecules are broken and new bonds are formed to produce the output molecules.

Explanation:

The statement that describes a reason that the output of molecules of cellular respiration are different from the input molecules is that the bonds between the atoms in the input molecules are broken and new bonds are formed to produce the output molecules.

A reaction is a process in which chemical substances act on each other and transformed into another chemical substances as a result. Reactions involve the breakage of bonds in the participating substances (reactants) to give different atoms. Thereafter, new bonds are formed between the various atoms to arrive at different chemical substances known as products.

Cellular respiration involves a reaction between sugar moles and oxygen molecules to give carbon dioxide molecules and water according to the following equations:

$C_6H_1_2O_6 + 6O_2 --> 6CO_2 + 6H_2O$

The bonds between the sugar molecules and the oxygen molecules are broken to to give different atoms and new bonds are formed between the resulting atoms to give different combination of products.

Answer 2

Answer:

The bonds between the atoms in the input molecules are broken and new bonds are formed to produce the output molecules.

Explanation:

Cellular respiration is a metabolic (catabolic) process carried out by the cells of all living organisms because it is the way usable energy in form of ATP is obtained. All organisms feed in order to acquire energy, the energy is stored in the chemical bonds of the digested food (glucose).

The process of cellular respiration then breaks down the food molecule in order to release the stored energy and convert it to ATP, which is the energy currency usable by the cell. The general equation of cellular respiration is:

C6H12O6 + 6O2 -----> 6CO2 + 6H2O

Since the energy is initially stored in the bonds of the input molecule (glucose), the bonds needs to be broken in order to assess the energy. Hence, cellular respiration breaks the bonds in the input molecules and rearranges the atoms by a new bond to form the output molecules (CO2 and H2O).