DBQ on p. 89 – November 25, 2012
1)
a) State the volume units that are shown in the equation. Decimeters cubed.
b) State the mass units that are shown in the equation. Grams, kilograms.
2)
a) Calculate the mass of ATP produced per dm3 of oxygen. ≈0.1358 kg of ATP
per dm3 of water
b) Calculate the mass of ATP produced per race in Table I.
Length of Race/ m
Volume of oxygen consumed in cell
Mass of ATP
respiration during the race/dm3
produced/kg
1,500
36
4.9
10,000
150
20.0
42,300
700
100
3) Explain how it is possible to synthesize large masses of ATP during races. It is
possible to synthesize large masses of ATP during races because runners take in a lot
of oxygen (by breathing the air). This oxygen is used in cell respiration to produce
ATP.
4) During a 100m race, 80 g of ATP is needed but only 0.5 dm3 of oxygen is consumed.
Deduce how ATP is being produced.
ATP is being produced through glycolysis. Sprinting is anaerobic because the rate of
energy needed exceeds that which can be provided by cell respiration, so tissues rely
on carbohydrates for energy. The byproduct of this (in humans) is lactate/lactic acid.