6 Questions
¿Cuál es el resultado neto de la glucolisis?
1 glucosa → 2 piruvato + 2 ATP + 2 NADH
¿Cuál es la función de la hexoquinasa en la glucolisis?
Inhibir la glucólisis cuando la glucosa-6-fosfato está presente
¿Cuántos ATP se producen durante la glucolisis?
2 ATP
¿Qué sucede con el piruvato durante la respiración anaeróbica?
Se convierte en lactato o etanol
¿Cuál es la función del NADH en la glucolisis?
Transportar electrones en la cadena de transporte de electrones
¿Cuál es la diferencia entre la respiración aeróbica y anaeróbica en cuanto a la producción de ATP?
La respiración anaeróbica produce 2 ATP y la respiración aeróbica produce 36-38 ATP
Study Notes
Glucolysis
Glycolytic Pathway
- Glucolysis is a metabolic pathway that converts glucose (a 6-carbon sugar) into pyruvate (a 3-carbon compound)
- The pathway consists of 10 enzyme-catalyzed reactions
- Occurs in the cytosol of cells
- Net result: 1 glucose molecule → 2 pyruvate molecules + 2 ATP molecules + 2 NADH molecules
ATP Production
- Glucolysis produces 2 ATP molecules through substrate-level phosphorylation
- ATP is generated through the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate
- Additional ATP molecules can be generated during the electron transport chain in the mitochondria
Regulation of Glucolysis
- Glucolysis is regulated by feedback inhibition and allosteric control
- Key regulatory enzymes:
- Hexokinase (inhibited by glucose-6-phosphate)
- Phosphofructokinase (activated by fructose-2,6-bisphosphate and inhibited by ATP and citrate)
- Pyruvate kinase (activated by fructose-1,6-bisphosphate and inhibited by ATP and alanine)
NADH and FADH2
- NADH (nicotinamide adenine dinucleotide) is a high-energy electron carrier produced during glucolysis
- NADH is used to generate ATP in the electron transport chain
- FADH2 (flavin adenine dinucleotide) is not produced during glucolysis, but is involved in the electron transport chain
Anaerobic Respiration
- Anaerobic respiration occurs in the absence of oxygen
- Glucolysis is the only stage of cellular respiration that occurs during anaerobic respiration
- Pyruvate is converted into lactate or ethanol, depending on the organism
- Anaerobic respiration produces 2 ATP molecules per glucose molecule, compared to 36-38 ATP molecules during aerobic respiration
Aprende sobre el camino metabólico de la glucólisis, su regulación, producción de ATP y NADH, y su relación con la respiración anaeróbica.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
