Lecture 4 Metabolism

Question 1

Redox Reactions

Answer 1

-Electrons transferred from one molecule to another

Question 2

Oxidation

Answer 2

Loss of electrons

Question 3

Reduction

Answer 3

Gain of electrons

Question 4

Electron Carriers

Answer 4

• NADH and FADH2
• They accept electrons during chemical reactions
• Drop the off at the electron transport chain

Question 5

Adenosine Triphosphate(ATP)

Answer 5

• Energy Currency of cells
• stores energy in 2 high energy bonds
• when bonds are broken, energy is released

Question 6

Carbohydrate Catabolism

Answer 6

Oxidizing Carbohydrate(Glucose)

• Energy can be obtained
  1. Respiration
  2. Fermentation

Question 7

Respiration

Answer 7

1. Aerobic

2. anaerobic

Question 8

Aerobic Respiration

Answer 8

-Electrons that are releaseby oxidation are passed down an electron transport system to an oxygen electron acceptor

Question 9

Cycle of aerobic respiration

Answer 9

1. glycolysis
2. Transition Reaction
3. Krebs cycle
4. Electron transport chain

Question 10

Glycolysis

Answer 10

splitting of glucose

• oxidation of glucose to two molecules of pyruvic acid
• location:Cytoplasm
• Cost: 2 ATP
• End products: 2 pyretic acid,2 NADH, 4 ATP(net gain of 2)

Question 11

Transition Reaction

Answer 11

Connects glycolysis to the Krebs cycle
-decarboxylation of pyretic acid into acetyl co enzyme A
Location:mitochondrial matrix
End products: 2 acetyl coenzyme A
2 CO2, 2 NADH

Question 12

Krebs cycle

Answer 12

-A series of chemical reactions that begin with Oxaloacetic acid(4c) and aetyl co A(2c) make citrate (6c)
-Decarbxylation of acetyl group in a cycle Regenerate oxaloacetic acid
Location:mitochondrial matrix
End product: 2 ATP, 4 CO2 ,6 NADH, 2 FADH2

Question 13

Electron transport chain

Answer 13

-A chain of coenzymes
-Recives electrons /H+ from NADH and FADH2
-Transport Electrons to terminal acceptor 02 to H2O
-Location; inner mitochondrial membrane
-ATP is produced:
NADH=3 ATP
FADH2= 2 ATP