sherzsy
Badges: 13
Rep:
?
#1
Report Thread starter 1 year ago
#1
I really don't understand how the question and answer links together, would someone please explain this to me thanks

Explain how having a larger number of proton pores in the inner mitochondrial membrane
would result in a person being less likely to gain weight. (6)

MARKSCHEME:
.larger number of protons pores results
in protons leaking back into matrix
• reduces yield of ATP from
chemiosmotic gradients
• less ATP is made from oxidative
phosphorylation
• more energy wasted as heat
• energy from chemiosmosis decoupled
from ATP synthesis
• energy yield from aerobic respiration
reduced per molecule of glucose
• food not converted to ATP as
efficiently
• less excess energy intake in diet
• less deposition of fat
• fat stores may be respired for energy
0
reply
bob981
Badges: 12
Rep:
?
#2
Report 1 year ago
#2
Okay that’s not an easy question I know but let me try to explain, so respiration involves breaking down molecules and creating reduced NAD which help create a proton gradient in the inner mitochondrial membrane. If there are more protons in the membrane then some will ‘leak’ back into the matrix. This means there are less protons to move through ATP synthase hence less ATP will be made by oxidative phosphorylation hence less energy is created from each molecule of glucose. The body will then digest stores of fat or muscle to make this ATP hence the person is likely to lose weight.
Hope that helps, it’s not the perfect explanation but it’s the best I can offer!
2
reply
sherzsy
Badges: 13
Rep:
?
#3
Report Thread starter 1 year ago
#3
Thank you so much makes much more sense now
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Current uni students - are you thinking of dropping out of university?

Yes, I'm seriously considering dropping out (80)
14.26%
I'm not sure (25)
4.46%
No, I'm going to stick it out for now (178)
31.73%
I have already dropped out (12)
2.14%
I'm not a current university student (266)
47.42%

Watched Threads

View All