The tricarboxylic acid (TCA) cycle, also known as the Krebs or citric acid cycle, is
the main source of energy for cells and an important part of aerobic respiration
. The cycle harnesses the available chemical energy of acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).
Why is the Krebs cycle important in cellular respiration?
The Krebs cycle is likely the most important part of the process of aerobic respiration because
it drives the formation of electron carriers
. These carriers are important. They carry the energy used to create a large number of ATP molecules in the final steps of aerobic respiration.
What is the relationship between the Krebs cycle and aerobic respiration?
What part of cellular respiration is the Krebs cycle?
The Krebs cycle is the
second stage
of cellular respiration. During the Krebs cycle, energy stored in pyruvate is transferred to NADH and FADH
2
, and some ATP is produced.
Glycolysis is one of the main processes involved in cellular respiration
. Glycolysis is the pathway that converts sugar into energy, or glucose (C6H12O6) into pyruvate (CH3COCOO), generating ATP during the conversion.
These three phosphate groups are linked to one another by two high-energy bonds called phosphoanhydride bonds.
When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate (ADP).
How are ATP and ADP similar and different?
ATP is adenosine triphosphate and contains three terminal phosphate groups, whereas ADP is adenosine diphosphate and contains only two phosphate groups
. ADP is produced on hydrolysis of ATP and the energy released in the process is utilised to carry out various cellular processes.
How does ADP and P relate to ATP and energy generation and storage?
The electrons in these bonds carry energy. Within the power plants of the cell (mitochondria),
energy is used to add one molecule of inorganic phosphate (P) to a molecule of adenosine diphosphate (ADP)
. The amount of energy stored is about 7,300 calories for every mole of ATP formed.
What is the ATP and ADP cycle?
The ATP/ADP cycle
provides energy for cellular activity
. When energy is. necessary the third phosphate group breaks off from ATP. This forms ADP and. releases energy.
What is the relationship between ATP and ADP quizlet?
What is the relationship between ATP and ADP?
ATP is converted into ADP and ADP can be changed back to ATP by the addition of a phosphate group
.
How do ATP and ADP differ in number of ribose groups?
ATP has three phosphate groups, whereas ADP has two phosphate groups on its ribose sugar
.
How important are the ATP and ADP cycle during exercise?
In this reaction, a phosphate group (in red) is transferred from phosphocreatine to ADP to form ATP very rapidly, allowing muscle contraction to continue for about 10 seconds.
When phosphocreatine is depleted, the muscles must turn to metabolism of fuel molecules to produce more ATP to power physical activity
.
What is meant by an ATP cycle and why is it an important frequent event in cells?
What is meant by an ATP cycle and why is it an important, frequent event in cells? …
A process like cellular respiration can provide the energy needed to add a phosphate to ADP to regenerate ATP again
. This is important as ATP can be used quickly.
Why is the ATP ADP cycle important?
| ATP ADP | Contains 3 phosphate groups (triphosphate) Contains 2 phosphate groups (diphosphate) |
|---|
