AQA A Level · Biology 7402
5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on ATP.
A student used a colorimeter to determine the concentration of ATP in a cell extract. If the hydrolysis of one mole of ATP to ADP and \(P_i\) releases approximately \(30.5\text{ kJ mol}^{-1}\) of energy under standard conditions, which of the following best describes the enzyme ATP hydrolase in this reaction?
ATP is hydrolysed to provide energy for cellular processes. Which of the following statements best describes the phosphorylation of a compound using the inorganic phosphate (\(P_i\)) released from ATP?
Scientists were investigating the properties of ATP. They found that in a specific cell type, the rate of ATP hydrolysis was significantly higher than the rate of ATP resynthesis. What is the most likely physiological consequence for this cell?
The hydrolysis of ATP is a coupled reaction in many cellular processes. Which statement accurately describes a result of this hydrolysis according to the syllabus?
During the hydrolysis of ATP, the inorganic phosphate (\(P_i\)) released can be used in the process of phosphorylation. What is the primary biological advantage of this process?
Adenosine triphosphate (ATP) is synthesized from adenosine diphosphate (ADP) and an inorganic phosphate group. Name the enzyme that catalyzes this condensation reaction and state one specific biological process during which this reaction occurs.
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Identify the enzyme that catalyzes the resynthesis of ATP from ADP and inorganic phosphate, and name two specific cellular processes where this synthesis occurs.
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A researcher inhibited the enzyme ATP synthase in a eukaryotic cell. Predict the immediate effect on the resynthesis of ATP and explain which specific part of the ATP molecule must be joined to ADP during this condensation reaction.
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