Question

question 1-7
which scenario below would most likely cause an increase in adp production?
○ a plant cell is exposed to high levels of sunlight.
○ an animal cell is exposed to high levels of oxygen.
○ a plant cell needs water to catalyze high energy reactions.
○ an animal cell moves large molecules through the membrane.

Explanation:

To determine which scenario increases ADP production, we analyze each option:

• Option 1 (Plant cell, high sunlight): High sunlight would drive photosynthesis, producing ATP (not increasing ADP directly, as ATP is made here).
• Option 2 (Animal cell, high oxygen): High oxygen typically supports aerobic respiration, which produces ATP (ADP is converted to ATP, so ADP would decrease or stay stable, not increase).
• Option 3 (Plant cell, water for reactions): Water is a reactant in photosynthesis/metabolism but doesn’t directly trigger ADP production. Catalysis by water (e.g., hydrolysis) might break bonds but doesn’t imply ADP increase.
• Option 4 (Animal cell, moving large molecules): Moving large molecules (e.g., via active transport) requires ATP. When ATP is used (hydrolyzed to ADP + Pi), ADP production increases. Active transport expends ATP, so ATP → ADP + Pi, raising ADP levels.

Answer:

D. An animal cell moves large molecules through the membrane.