CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Substrate level phosphorylation occurs during which step of Kreb's cycle?

A
Succinyl -CoA Succinic acid
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Isocitric acid Oxalosuccinic acid
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Oxalosuccinic acid α-keto glutaric acid
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Malic acid OAA
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Succinyl -CoA Succinic acid
In the succinyl CoA synthetase reaction, the thioester bond between HS-CoA and the succinyl group is hydrolyzed. Since it is a rich in energy bond, the energy released is enough for synthesizing GTP from GDP + (P). This GTP is equivalent, from the energetic point of view, to ATP. In fact, GTP can transfer the (P) group to ADP to form ATP:
GTP + ADP ————–à GDP + ATP
Since ATP can be produced from this reaction, without participation of the respiratory chain, this process is called Substrate Level Phosphorylation (SLP) in contrast to the Oxidative Phosphorylation (ATP synthesis using the energy released in the Electron Transport Chain).
So the correct option is 'succinyl- CoA succinic acid'.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Aerobic Respiration
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon