Multiple Choice
Which group of macromolecules is primarily used as the source of energy for cellular functions?
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7. Energy and Metabolism
Introduction to Energy
Multiple Choice
Which source of energy is primarily used for short bursts of activity in cells?
A
Glycogen
B
Fatty acids
C
Glucose
D
ATP
Verified step by step guidance1
Understand the role of ATP in cellular activities: ATP (adenosine triphosphate) is the primary energy carrier in cells, providing energy for various cellular processes.
Recognize the types of energy sources available in cells: Cells can use glycogen, fatty acids, and glucose as energy sources, but they are converted into ATP to be used directly.
Identify the energy source for short bursts of activity: For quick and immediate energy needs, cells rely on ATP because it can be rapidly mobilized and used.
Consider the process of ATP production: ATP is produced through cellular respiration, primarily from glucose, but for short bursts, cells use stored ATP directly.
Conclude why ATP is the correct answer: ATP is already present in cells and can be used instantly, making it ideal for short bursts of activity compared to other sources that require conversion.
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