Question

question 2 of 10
which chemical equation represents a process that takes place in yeast
cells?

a. ( o_2 + \text{sugar}
ightarrow co_2 + h_2o + \text{light energy} )

b. ( co_2 + h_2o + \text{light energy}
ightarrow o_2 + \text{sugar} )

c. ( co_2 + h_2o + \text{atp energy}
ightarrow o_2 + \text{sugar} )

d. ( o_2 + \text{sugar}
ightarrow co_2 + h_2o + \text{atp energy} )

Explanation:

Yeast cells perform cellular respiration (aerobic or anaerobic, but aerobic respiration is a key process here). Aerobic respiration uses oxygen and sugar (glucose) to produce carbon dioxide, water, and ATP (energy). Let's analyze each option:

• Option A: Producing light energy is incorrect; respiration produces ATP, not light.
• Option B: This is photosynthesis (used by plants/algae), not yeast (which are fungi, don't photosynthesize).
• Option C: Also related to photosynthesis - like processes, not yeast's metabolism.
• Option D: Matches aerobic respiration: \( \text{O}_2 + \text{sugar}

ightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{ATP energy} \), where sugar is broken down with oxygen to release energy (ATP), \( \text{CO}_2 \), and \( \text{H}_2\text{O} \).

Answer:

D. \( \text{O}_2 + \text{sugar}
ightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{ATP energy} \)