Multiple Choice
What type of energy does a plant use to convert \( \mathrm{CO_2} \) and \( \mathrm{H_2O} \) into sugar during photosynthesis?
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9. Photosynthesis
Introduction to Photosynthesis
Multiple Choice
Which of the following is true for both photosynthesis and cellular respiration?
A
Both produce glucose as a final product.
B
Both involve the transfer of electrons through an electron transport chain.
C
Both processes occur only in plant cells.
D
Both require sunlight as a direct energy source.
Verified step by step guidance1
Understand the processes of photosynthesis and cellular respiration: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. Cellular respiration is the process by which cells break down glucose to produce ATP, the energy currency of the cell.
Analyze the options provided: Evaluate each statement to determine its accuracy in relation to both photosynthesis and cellular respiration.
Option 1: 'Both produce glucose as a final product.' - Photosynthesis produces glucose as a final product, but cellular respiration breaks down glucose into ATP, carbon dioxide, and water. This statement is incorrect.
Option 2: 'Both involve the transfer of electrons through an electron transport chain.' - Both processes involve electron transport chains. In photosynthesis, electrons are transferred in the thylakoid membrane during the light-dependent reactions. In cellular respiration, electrons are transferred in the mitochondrial inner membrane during oxidative phosphorylation. This statement is correct.
Option 3 and 4: 'Both processes occur only in plant cells' and 'Both require sunlight as a direct energy source.' - Cellular respiration occurs in all eukaryotic cells, not just plant cells, and it does not require sunlight. Photosynthesis requires sunlight, but cellular respiration does not. These statements are incorrect.
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