Multiple Choice
ATP is called the energy currency of the cell because it stores energy in its phosphoanhydride bonds and can rapidly transfer a phosphate group to drive endergonic reactions.
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3. Energy
Activated Carriers
Multiple Choice
In the context of activated carriers, what molecule is considered the primary energy currency of the cell?
A
ATP (adenosine triphosphate)
B
NADH (nicotinamide adenine dinucleotide, reduced form)
C
FADH2 (flavin adenine dinucleotide, reduced form)
D
cAMP (cyclic adenosine monophosphate)
Verified step by step guidance1
Step 1: Understand the concept of activated carriers in cell biology. Activated carriers are molecules that store and transfer energy or specific chemical groups within cells to drive various biochemical reactions.
Step 2: Identify the primary role of each molecule listed: ATP, NADH, FADH2, and cAMP. ATP is known for storing and providing energy directly for cellular processes, while NADH and FADH2 mainly carry electrons for energy production, and cAMP acts as a signaling molecule.
Step 3: Recognize that the primary energy currency of the cell is the molecule that directly provides energy for most cellular activities, such as muscle contraction, active transport, and biosynthesis.
Step 4: Recall that ATP (adenosine triphosphate) contains high-energy phosphate bonds that release energy when hydrolyzed, making it the main molecule used by cells to power energy-requiring processes.
Step 5: Conclude that among the options, ATP is considered the primary energy currency of the cell because it directly supplies energy for cellular functions, whereas NADH and FADH2 are primarily electron carriers, and cAMP is a secondary messenger.
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