Glycolysis, Link Reaction and Krebs Cycle Flashcards
1
Q
Describe the steps to glycolysis
6
A
- glucose is phosphorylated and made more reactive by adding two phosphates
- using enrgy from hydrolysis of two ATP to ADP
- glucose split into 2TP
- 2TP is oxidised and transfers H to NAD to make reduced NAD
- converts 2TP into 2 pyruvate
- ADP+Pi=ATP
2
Q
How is acetyle coenzyme A formed in the link reaction?
5
A
- pyruvate a.t into matrix of mitochondria
- P oxidised to acetate by losing CO2 and 2H
- NAD gains H to make reduced NAD
- ADP+Pi=ATP
- acetate combines w/ coenzyme A (CoA) to make acetylcoenzyme A
3
Q
Describe the steps of the Krebs cycle
4
A
- (2C) acetylcoenzyme Acombines w/ 4C molecule to make 6C
- 6C loses CO2 + H to make 4C
- H transfers to NAD so reduced NAD/FAD
- ADP+Pi=ATP
4
Q
How is ATP useful in many biological processes?
4
A
-releases energy in small amounts
-broken down in one step
-lowers a.e
-resynthesised
5
Q
Why is it important that plants produce ATP during respiration and in photosynthesis?
5
A
-photosynthesis doesnt produce ATP in the dark
-ATP can’t be moved from cell to cell
-plants use more ATP than they make
-some tissues cant photosynthesise
6
Q
which reaction occurs in the mitochondria?
2
A
-link reaction
-krebs cycle
7
Q
which reaction produces CO2?
A
-link reaction
-krebs cycle
8
Q
which reaction reduces NAD?
A
-all 3
