wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A demonstration of chemiosmosis by Peter Mitchell allowed ................. to move down their concentration gradient by using two different ................ .

A
Potassium ions, light frequencies
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Hydrogen ions, light frequencies
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Potassium ions, pH solutions
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Hydrogen ions, pH solutions
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
E
Potassium ions, electromagnetic frequencies
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is D Hydrogen ions, pH solutions
Peter Mitchell demonstrated the chemiosmotic mechanism by first immersing mitochondria in a medium at pH 8. All mitochondrial compartments equilibrate at pH 8 and since mitochondria can not set their own proton gradient using the electron transport chain, they starved. This was followed by placing the same mitochondria in an acidic medium with a much higher concentration of protons. Protons move quickly through the freely permeable outer membrane into the intermembrane space and thereby lowering the pH of this compartment. The established proton gradient across the inner mitochondrial membrane allows the flow of protons from high concentration to low concentration through specialized channels in the inner mitochondrial membrane with simultaneous ATP synthesis. Thus, the correct answer is D.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Transport Across the Membrane
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon