ATPAQA A-Level Biology: Flashcards

What these 13 flashcards ask

What is ATP made of?
Why is ATP called a nucleotide derivative?
Write the equation for the hydrolysis of ATP.
Which enzyme catalyses the hydrolysis of ATP?
How much energy is released when 2.0 mol of ATP is hydrolysed, at 30 kJ per mol?
What does it mean to say hydrolysis of ATP is coupled to a reaction?
Give two energy-requiring processes driven by ATP.
What does it mean to phosphorylate a compound?
Which enzyme resynthesises ATP?
What type of reaction forms ATP from ADP and Pi?
In which processes is ATP resynthesised?
Why is the hydrolysis of ATP a good source of energy for cells?
Why is ATP continually resynthesised?

Exam questions on ATP

The hydrolysis of ATP to ADP and inorganic phosphate (Pi) releases about 30 kJ of energy per mole of ATP.
Describe the hydrolysis of ATP.2 marks
In the first step of glycolysis, glucose reacts with ATP to form glucose phosphate and ADP. Glucose phosphate is more reactive than glucose, and the reaction is catalysed by an enzyme.
Explain how the hydrolysis of ATP makes the formation of glucose phosphate possible.2 marks
During intense exercise the muscles of an athlete hydrolyse ATP at a rate of 0.80 mol per minute, but the muscles contain only about 0.10 mol of ATP at any one time. Assume that 30 kJ of energy is released per mole of ATP hydrolysed.
Suggest why ATP, rather than glucose, is the immediate source of energy for muscle contraction.3 marks

Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).