ETIABO: Respiration- The Krebs Cycle Flashcards
(16 cards)
Two carbon atoms are lost during the Krebs cycle. These are lost in the form of ______.
Carbon dioxide
What is the structure of the Krebs cycle?
………….Acetylcoenzyme A
4C 6C
Dots dont matter
There are arrows linking each of the 3 molecules.
This diagram doesnt mention the substances/molecules that exit the cycle e.g. ATP
How many carbon molecules are lost in the Krebs cycle?
2
How is ATP produced in the Krebs cycle?
ADP + Pi
Acetylcoenzyme A first reacts with a molecule containing __ carbons, which creates a 6 carbon molecule and looses coenzyme A.
4
How is a 6C molecule formed in the Krebs cycle?
- Acetylcoenzyme A reacts with a 4C molecule.
- Looses coenzyme A
- 6C molecule is formed
Why is coenzyme A needed?
- The reaction between acetylcoenzyme A and the 4C molecule NEEDS to be catalysed by it.
What happens in substrate-level phosphorylation?
- A molecule containing a phosphate group donates the phosphate group to ADP.
- An enzyme catalyses this reaction.
What process is ATP made by?
Substrate-level phosphorylation
What are the 3 molecules FORMED in the Krebs cycle?
- ATP
- 3x NADH
- FADH2
What are the 4 products of the Krebs cycle?
- ATP
- 3x NADH
- FADH
- CO2
To be used in respiration, triglycerides need to be broken down into what?
- 1 glycerol
- 3 fatty acids
In respiration, what is glycerol converted into?
Triose phosphate
In respiration what are fatty acids converted into?
Acetylcoenzyme A
In aerobic respiration, the majority of amino acids containing three carbons are converted to _______.
Pyruvate
In aerobic respiration, the majority of amino acids containing four or five carbon atoms are converted into molecules which are used in _________.
The Krebs cycle.
