ATP is the immediate source of energy for muscle contraction. The resting concentration of ATP in skeletal muscle is approximately 5.4×10−3 mmol g−15.4 \times 10^{-3}\text{ mmol g}^{-1}5.4×10−3 mmol g−1. During maximum intensity exercise, ATP in skeletal muscle is hydrolysed at a rate of approximately 3.6 mmol kg−1 s−13.6\text{ mmol kg}^{-1}\text{ s}^{-1}3.6 mmol kg−1 s−1. If ATP was not continuously resynthesised by metabolic pathways, maximum exercise could only be sustained for a very short duration.
Calculate how long maximum exercise would last if ATP was not resynthesised. Show your working.
Practise AQA A Level Biology ATP with exam-style questions for A Level Biology. 3 questions covering ATP, matched to the AQA A Level Biology (7402) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
