chapter 3 section 8

Question 1

How much energy does an average adult consume per day?

Answer 1

~11,700 kJ (2800 kcal).

Question 2

What is the thermodynamic efficiency of ATP synthesis?

Answer 2

~50%.

Question 3

How much energy from food is stored as ATP daily?

Answer 3

~5850 kJ.

Question 4

How much free energy is released by hydrolysis of 1 mole of ATP?

Answer 4

~50 kJ.

Question 5

How many moles of ATP are cycled daily in the human body?

Answer 5

~117 moles.

Question 6

How much ATP is present in a typical 70 kg human body at one time?

Answer 6

50 g.

Question 7

How many times is each ATP molecule recycled per day?

Answer 7

1300 times.

Question 8

Why doesn’t human ATP consumption cost millions daily?

Answer 8

Because ATP is efficiently recycled from ADP and phosphate.