2.8 Cell Respiration

Question 1

what is the definition of cell respiration

Answer 1

a controlled release of energy, in the form of ATP, from organic compounds in cells

Question 2

how do cells capture the energy released from cell respiration

Answer 2

they produce ATP

Question 3

which processes produce the most ATP per molecule of glucose?

Answer 3

aerobic respiration in a bacterial cell

Question 4

Humans can respire aerobically and anaerobically. Which are products of both aerobic cell respiration
and anaerobic cell respiration in humans?

Answer 4

pyruvate and ATP

Question 5

State the products of anaerobic respiration by yeast and give an application of each in society.

Answer 5

ethanol and carbon dioxide are products of anaerobic respiration. Ethanol produces beer and carbon dioxide is used in the production of bread as it raises the dough.

Question 6

Compare how pyruvate is used in human cells when oxygen is available and when oxygen is not
available

Answer 6

In anaerobic respiration, which is when oxygen is not available,
glycolysis breaks down glucose into two molecules of pyruvate,
which is, in animals, converted into lactic acid, ethanol and carbon dioxide in yeast.
The pyruvate molecules can be restored once oxygen is once again present in the cell.
In aerobic respiration, which is used when oxygen is present,
the pyruvate molecule is broken down into carbon dioxide and water.