Multiple Choice
What is the primary role of adenosine triphosphate (ATP) in the human body?
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7. Energy and Metabolism
ATP
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What is ATP primarily used for in the chloroplasts of plants?
A
To provide energy for the synthesis of glucose during the Calvin cycle
B
To break down starch into simple sugars
C
To absorb light energy during photosystem II
D
To transport oxygen out of the chloroplast
Verified step by step guidance1
Understand the role of ATP in cellular processes: ATP (adenosine triphosphate) is the primary energy currency of the cell, used to drive various biochemical reactions.
Review the function of chloroplasts: Chloroplasts are organelles in plant cells responsible for photosynthesis, which includes light-dependent reactions and the Calvin cycle (light-independent reactions).
Examine the Calvin cycle: The Calvin cycle is the process where carbon dioxide is fixed into glucose. ATP provides the energy required for the enzymatic reactions in this cycle, such as the conversion of 3-phosphoglycerate into glyceraldehyde-3-phosphate.
Eliminate incorrect options: ATP is not used to break down starch into simple sugars (this occurs in other parts of the plant), nor is it directly involved in absorbing light energy during photosystem II (light energy is absorbed by pigments like chlorophyll). ATP is also not used to transport oxygen out of the chloroplast.
Conclude the correct answer: ATP is primarily used in chloroplasts to provide energy for the synthesis of glucose during the Calvin cycle.
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