All aerobic organisms use the Krebs cycle, which is a series of chemical reactions, to produce energy that can be utilized by individual cells
. This cycle occurs in the matrix of the mitochondria, cellular organelles responsible for aerobic respiration that provide energy (ATP) for cells.
Does glycolysis produce energy?
Glycolysis is a cytoplasmic pathway which breaks down glucose into two three-carbon compounds and
generates energy
. Glucose is trapped by phosphorylation, with the help of the enzyme hexokinase. Adenosine triphosphate (ATP) is used in this reaction and the product, glucose-6-P, inhibits hexokinase.
What is common in glycolysis and Krebs cycle?
| Glycolysis Krebs Cycle | No carbon dioxide evolved Carbon dioxide evolved |
|---|
Which pathway is better for energy production?
Anaerobic pathway
Anaerobic metabolism breaks down sugars to resynthesize ATP. It is more robust in its ability to maintain energy production compared with the phosphagen system however can become overloaded leading to the buildup of lactate (more on that here)(Borresen & Lambert, 2009).
Does the process of glycolysis require an input of energy?
Does the process of glycolysis require an input of energy? Provide specific evidence from Model 1 to support your answer:
Yes, two ATP molecules are needed to convert a glucose molecule to two PGAL molecules
. 4.
What metabolic pathways are involved with the energy systems?
- Phosphagen (immediate source)
- Anaerobic (somewhat slow, uses carbohydrates)
- Aerobic (slow, uses either carbohydrate or fat)
Which metabolic pathway produces ATP the fastest?
Phosphagen System
The phosphagen system (also called the ATP-CP system) is the quickest way to resynthesize ATP (Robergs & Roberts 1997).
What are the three energy pathways?
The three main energy systems the body uses to create ATP are:
the ATP-CP energy pathway (or phosphagen system), glycolysis, and aerobic metabolism
.
What steps of glycolysis require energy what steps release energy?
The first phase of glycolysis requires energy, while the second phase completes the conversion to pyruvate and produces ATP and NADH for the cell to use for energy
. Overall, the process of glycolysis produces a net gain of two pyruvate molecules, two ATP molecules, and two NADH molecules for the cell to use for energy.
Is glycolysis aerobic or anaerobic?
Glycolysis occurs in both aerobic and anaerobic states
. In aerobic conditions, pyruvate enters the citric acid cycle and undergoes oxidative phosphorylation leading to the net production of 32 ATP molecules. In anaerobic conditions, pyruvate converts to lactate through anaerobic glycolysis.
How are glycolysis and phosphagen systems used in both aerobic and anaerobic exercise?
“Anaerobic glycolysis” does not require ‘oxygen' and uses energy of the glucose for forming ATP molecule.
Anaerobic glycolysis produces ATP very rapidly for the various activities. Aerobic glycolysis makes use of oxygen to produce ATP.
What energy systems use carbohydrates?
The
aerobic energy system
is where we utilize all three of our fuel sources. It is within this system that carbohydrates, fats and proteins may be processed in order to produce ATP. Carbohydrates come through the glycolytic system, producing pyruvate that proceeds into the aerobic system.
Which one of the following energy producing pathways produces more ATP?
Explanation: The
electron transport chain
generates the most ATP out of all three major phases of cellular respiration. Glycolysis produces a net of 2 ATP per molecule of glucose.
What are the three energy systems that replenish ATP?
Three energy systems function to replenish ATP in muscle:
(1) Phosphagen, (2) Glycolytic, and (3) Mitochondrial Respiration
. The three systems differ in the substrates used, products, maximal rate of ATP regeneration, capacity of ATP regeneration, and their associated contributions to fatigue.
