Question

question①
the energy - producing process in the mitochondria involves a series of reactions in which ______ is consumed and ______ is generated.
answer
○ water, oxygen
○ carbon dioxide; water
○ carbon dioxide; oxygen
○ oxygen; carbon dioxide
○ i dont know yet

Explanation:

The energy - producing process in mitochondria is cellular respiration. In cellular respiration, oxygen ($O_2$) is consumed as it is used to break down glucose and other molecules. During this process, carbon dioxide ($CO_2$) is generated as a waste product. Let's analyze each option:

• Option "water; oxygen": In cellular respiration, oxygen is consumed, not generated, and water is a by - product but not the main consumed substance here. So this is incorrect.
• Option "carbon dioxide; water": Carbon dioxide is a product, not a consumed substance in cellular respiration. So this is incorrect.
• Option "carbon dioxide; oxygen": Carbon dioxide is a product and oxygen is a reactant (consumed), so this is reversed. Incorrect.
• Option "oxygen; carbon dioxide": This matches the process of cellular respiration where oxygen is consumed and carbon dioxide is produced.
• Option "I DON'T KNOW YET" is not a correct answer as we can determine the right option.

Answer:

D. oxygen; carbon dioxide (assuming the fourth option is labeled D, if the original options have labels like A - E, adjust the label accordingly. Based on the order, if the options are in the order given: first option (water; oxygen), second (carbon dioxide; water), third (carbon dioxide; oxygen), fourth (oxygen; carbon dioxide), fifth (I DON'T KNOW YET), then the correct option is the fourth one, say D. oxygen; carbon dioxide)