Bioenergetics and Cellular Respiration

Question 1

Metabolism Definition

Answer 1

totality of an organism’s chemical reactions, can be anabolic or catabolic

Question 2

Name the 3 stages of cellular respiration and their sub-cellular location

Answer 2

glycolysis(cytosol), citric acid cycle(mitochondria) and oxidative phosphorylation(mitochondria)

Question 3

How many ATP are prodiced per glucose in respiration

Answer 3

36-38

only 2 atp are produced in anaerobic respiration

Question 4

What is the overall reaction for cellular respiration and how much gibbs free energy is produced

Answer 4

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O

ΔG= -2870kJ/mol

Question 5

Explain the importance of redox reactions in energy generation

Answer 5

The
relocation of electrons releases energy stored in organic molecules,
and this energy ultimately is used to synthesize ATP.

Question 6

What is an exergonic reaction

Answer 6

Exergonic reactions release energy that can be used for chemical work (endergonic reactions), transport and movement

Question 7

Summary of how ATP is formed

Answer 7

ATP is formed by substrate-level and oxidative phosphorylation of ADP and acts as an energy currency

Question 8

How does the electron transport chain produce ATP

Answer 8

The electron transport chain establishes a proton gradient across the inner membranes of mitochondria and chloroplasts

H+ flow back through membrane-bound ATP synthases which produce ATP

Question 9

What acts as a high energy intermediate between redox potential and ATP synthesis

Answer 9

The trans-membrane H+ gradient

Question 10

Name the phases of glycolisis

Answer 10

Energy investment phase - 2 ATP used

Energy payoff phase - 2 pyruvate + 2 H2O