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Alternative Pathways in cell respiration. Cell Respiration is separated into 3 stages . ELECTRON TRANSPORT AND OXIDATIVE PHOSPHORYLATION. KREBS CYCLE. GLYCOLYSIS. NADH. FADH 2. NADH. NADH. Electron transport chain. Glucose. CO 2. Pyruvate. Krebs Cycle. H 2 O. CO 2. ATP. ATP.

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cell respiration is separated into 3 stages
Cell Respiration is separated into 3 stages

ELECTRON TRANSPORT AND OXIDATIVE PHOSPHORYLATION

KREBS CYCLE

GLYCOLYSIS

NADH

FADH2

NADH

NADH

Electron transport chain...

Glucose

CO2

Pyruvate

Krebs

Cycle

H2O

CO2

ATP

ATP

ATP

Energy/electrons are transferred from glucose to convert NAD+ to NADH, which is used in the ETC to make ATP

the metabolism of all macromolecules is tied to cellular respiration

Fatty acids

Fats

Krebs cycle

Glycerol

Glucose

Pyruvate

Acetyl CoA

Sugars

Carbs

Proteins

Amino acids

NH3

The metabolism of all macromolecules is tied to cellular respiration
  • Carbohydrates, fats, and proteins can be broken down and used in glycolysis and the Kreb’s cycle.
slide5
Cellular respiration is carefully regulated: when ATP is abundant, respiration slows down when ATP is needed, respiration speeds up
the metabolism of all macromolecules is tied to cellular respiration1
The metabolism of all macromolecules is tied to cellular respiration
  • Excess intermediates of glycolysis and the Kreb’s cycle can be converted to stored carbohydrates, fats and proteins.

Pathway for

synthesis of

RNA, DNA

Phospholipids

Fats

Glycogen

or starch

Several intermediaries used as

substrates in amino acid synthesis

Fatty acids

Pruvate

Glucose

Acetyl CoA

Krebs

cycle

Lactate

(from fermentation)