Question

which statement below is correct?
photosynthesis produces atp, and cellular respiration requires light energy.
photosynthesis produces carbon dioxide, and cellular respiration produces sugars.
photosynthesis and cellular respiration occur in both plant and animal cells.
photosynthesis produces the oxygen required for cellular respiration.

Explanation:

• First option: Cellular respiration does not require light energy. It occurs in the mitochondria and uses glucose and oxygen to produce ATP. Photosynthesis produces ATP during the light - dependent reactions.
• Second option: Photosynthesis uses carbon dioxide (\(CO_2\)) and water (\(H_2O\)) to produce sugars (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)). Cellular respiration uses sugars and oxygen to produce carbon dioxide, water, and ATP.
• Third option: Photosynthesis occurs in plant cells (in chloroplasts) and some protist cells. Animal cells do not have chloroplasts and cannot perform photosynthesis. Cellular respiration occurs in both plant and animal cells.
• Fourth option: Photosynthesis has the equation \(6CO_2 + 6H_2O+light

ightarrow C_6H_{12}O_6 + 6O_2\). The oxygen (\(O_2\)) produced by photosynthesis is used as the final electron acceptor in the electron - transport chain of cellular respiration (equation \(C_6H_{12}O_6+6O_2
ightarrow 6CO_2 + 6H_2O+ATP\)).

Answer:

Photosynthesis produces the oxygen required for cellular respiration.