Cellualr Respiration

Question 1

Oxidation

Answer 1

Loss of electrons from one substance

Question 2

Reduction

Answer 2

Addition of electrons to one substance

Question 3

Exergonic reactions

Answer 3

Release energy to the surrounding environment stored in the bonds of chemicals capturing the energy
Ex: cellular respiration

Question 4

Endergonic reactions

Answer 4

A net input of energy; products contain more energy than the reactants
Ex: photosynthesis

Question 5

Cellular respiration formula

Answer 5

C6H12O6+ 6O2–> 6CO2 + 6H2O + ATP

Question 6

Steps of cellular respiration

Answer 6

-Glycolisis
-Krebs/ citric acid cycle
-Oxidative Phosphorylation

Question 7

What happens in the first step

Answer 7

Glycolysis
-occurs in cytoplasm
-oxidizes glucose to pyruvate
-invest 2 ATP —>4 ATP produced
-net production of 2 ATP

Question 8

what happens during the intermediate step

Answer 8

-occurs in outer membrane into matrix
-Pyruvate–>Acetyl-co-A
-CO2 is released
- 2NAD+ –> 2NADH : goes from oxidized to reduced
-No ATP produced

Question 9

Citric acid cycle/ Krebs cycle

Answer 9

-occurs in mitochondria
-Acetyl-co-A –> oxaloacetate
-2 turns
- each:
1 ATP
3 NADH
1 FADH2
2CO2

Question 10

oxidative phosphorylation

Answer 10

• starts in matrix where NADH and FADH2 go from reduced to oxidized again to release e- and H+ and build ATP
  -moves from matrix to membrane where the e- and H+ are pulled into the electron transfer chain, with O2 it produces H2O
• Channels open and H+ ions move to inner membrane where ADP + Pi happens to produce ATP (ATP synthase) (chemeosmosis)