Cellular Respiration

Question 1

The breakdown of glucose Is used to do what?

Answer 1

Synthesize ATP from ADP and inorganic phosphate (Pi)

Question 2

Gibbs free energy 🔺G

Answer 2

• Energy transformation is not 100% Efficient
• Gibbs free energy is the energy available to do the work
• energy released during a reaction with 🔺G can be used to do work in other reaction that require energy

Question 3

-🔺G

Answer 3

Products that have less energy than reactants -> exergonic reaction (cell respiration)

Question 4

+🔺G

Answer 4

Products have more free energy than the reactants

-> endergonic reaction (photosynthesis)

Question 5

Cristae

Answer 5

-Folds in the mitochondria

Increases SA for reactions

Question 6

Equation of cellular respiration

Answer 6

6O(2) + C(6)H(12)O(6) –> 6CO(2) + 6H(2)O + 36ATP

Question 7

Chemoautotrophs

Answer 7

Build organic molecules from inorganic materials

Ex. Thermophiles use iron and magnesium

Question 8

Oxidization

Answer 8

Losing electrons

Question 9

Reduction

Answer 9

Gains electrons

Question 10

Aerobic cell respiration

Answer 10

• Occurs in presence of oxygen
• involves 20 reactions
• results in decrease in free energy and is classified as exergonic (🔺G = -2870kj/mol of glucose)
• a large amount of activation energy would be required, but combustion of glucose in cellular respiration uses several reactions with a small activation energy

Question 11

Anaerobic pathways ?

Answer 11

Two process oxidize food molecules in absence of oxygen.

1. Anaerobic respiration
2. Fermentation

Release small amounts of free energy compared to aerobic respiration

Question 12

Obligate anaerobe

Answer 12

Must live in oxygen free environments to survive

Ex. Gangrene

Question 13

Facultative anaerobe

Answer 13

Can live in both aerobic and anaerobic conditions

Ex. Salmonella causes food poisoning