Question

based on what you have learned about cellular respiration, select the true statements. the reactants of cellular respiration are made of different types of atoms than the products. food provides an organism with energy - rich molecules, which are broken down in cells. during cellular respiration, chemical reactions do not release energy. the chemical bonds between atoms change during cellular respiration.

Explanation:

• First statement: Cellular respiration follows the law of conservation of mass. Reactants (glucose \(C_6H_{12}O_6\) and \(O_2\)) and products (\(CO_2\) and \(H_2O\)) are made of \(C\), \(H\), and \(O\) atoms. So, this statement is false.
• Second statement: Food (e.g., glucose) has energy - rich chemical bonds. In cells (through cellular respiration), these molecules are broken down (e.g., \(C_6H_{12}O_6+6O_2

ightarrow6CO_2 + 6H_2O+\text{energy}\)). So, this statement is true.

• Third statement: Cellular respiration is an exergonic process. Chemical reactions (like the breakdown of glucose) release energy (stored in ATP). So, this statement is false.
• Fourth statement: In cellular respiration, bonds in glucose (\(C - C\), \(C - H\) etc.) and \(O_2\) (\(O=O\)) are broken, and new bonds (\(C = O\) in \(CO_2\), \(O - H\) in \(H_2O\)) are formed. So, this statement is true.

Answer:

• Second statement: Food provides an organism with energy - rich molecules, which are broken down in cells.
• Fourth statement: The chemical bonds between atoms change during cellular respiration.