7.6: Glycolysis and the citric acid cycle connect to many other metabolic pathways

Question 1

Where are all the electrons coming from that go into the Krebs cycle

Answer 1

They come from the various organic compounds

Question 2

How is protein broken down? Fats(why so significant)?

Answer 2

Proteins are digested into amino acids and amino groups must be removed before amino acids can feed glycolysis or the citric acid cycle

Fats are digested to glycerol and fatty acids, An oxidized gram of fat produces more than twice as much ATP as an oxidized gram of carbohydrate

Question 3

beta-oxidation

Answer 3

Fatty acids are broken down and yield Acetyl CoA

Question 4

How are anabolic pathways used in our body?

Answer 4

• The body uses small molecules to build other substances
• Some of these small molecules come directly from food; others can be produced during glycolysis or the citric acid cycle