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Multiple Choice
The construction of ATP by the addition of a phosphate molecule to ADP is an example of:
A
deamination
B
oxidation
C
phosphorylation
D
hydrolysis
Verified step by step guidance
1
Understand the process being described: The problem involves the construction of ATP (adenosine triphosphate) by adding a phosphate group to ADP (adenosine diphosphate). This is a key reaction in cellular energy metabolism.
Recall the definition of phosphorylation: Phosphorylation is the process of adding a phosphate group (PO₄³⁻) to a molecule, often mediated by enzymes. In this case, a phosphate group is added to ADP to form ATP.
Differentiate between the terms provided: Deamination refers to the removal of an amino group from a molecule, oxidation involves the loss of electrons, and hydrolysis is the breaking of a bond using water. None of these processes describe the addition of a phosphate group.
Relate the process to cellular respiration: ATP synthesis through phosphorylation occurs during cellular respiration, specifically in processes like substrate-level phosphorylation or oxidative phosphorylation.
Conclude that the correct term for the described process is phosphorylation, as it directly refers to the addition of a phosphate group to ADP to form ATP.