Multiple Choice
Alanine and leucine are examples of ______ amino acids.
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3. Amino Acids
Amino Acid Groups
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Which functional group is commonly used in cells to transfer energy?
A
Carboxyl group (\(\mathrm{-COOH}\))
B
Phosphate group (\(\mathrm{PO_4^{3-}}\))
C
Amino group (\(\mathrm{-NH_2}\))
D
Hydroxyl group (\(\mathrm{-OH}\))
Verified step by step guidance1
Understand the role of functional groups in biochemical processes. Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
Recognize that energy transfer in cells often involves molecules like ATP (adenosine triphosphate), which contains phosphate groups (
). These groups are key in transferring energy during biochemical reactions.
Learn that phosphate groups are involved in phosphorylation, a process where a phosphate group is added to a molecule, often activating or deactivating enzymes and other proteins, and playing a critical role in energy transfer.
Compare the functional groups listed in the problem: Carboxyl (
), Amino (
), Hydroxyl (
), and Phosphate (
). Note that phosphate groups are uniquely suited for energy transfer due to their ability to store and release energy in the form of high-energy bonds.
Conclude that the phosphate group (
) is the functional group commonly used in cells to transfer energy, as seen in molecules like ATP.
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