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Chemiosmosis

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Structural Basis for Biological Function (Membrane Proteins) Quiz on Chemiosmosis, created by gina_evans0312 on 14/12/2013.
gina_evans0312
Quiz by gina_evans0312, updated more than 1 year ago
gina_evans0312
Created by gina_evans0312 about 11 years ago
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Resource summary

Question 1

Question
Tenet 1- The membrane should be permeable to protons
Answer
  • True
  • False

Question 2

Question
Tenet 2 - An electron transport chain powers the pumping of protons across a cell membrane
Answer
  • True
  • False

Question 3

Question
Tenet 3- Energy transducing membranes must have special systems allowing ions and metabolites to pass (to maintain osmotic pressure in the case of a high membrane potential)
Answer
  • True
  • False

Question 4

Question
Tenet 4- The ATP synthase should NOT also act as an ATP translocator
Answer
  • True
  • False

Question 5

Question
Why does disrupting the inner mitochondrial membrane increase alkylisation of the medium?
Answer
  • The inner membrane becomes more permeable and protons enter the mitochondria down the concentration gradient
  • The inner membrane becomes more permeable and protons leave the mitochondria down the concentration gradient

Question 6

Question
Why does O2 injection acidify the membrane and prove chemiosmotic theory?
Answer
  • The O2 allows protons to be pumped out of the inner membrane into the solution, acidifying it
  • The O2 allows protons to be pumped out of the solution into the mitochondria acidifying it
  • The medium then alkylises as they flow back in

Question 7

Question
The number of protons pumped is substrate dependent
Answer
  • True
  • False

Question 8

Question
What is this the symbol for in the protonmotive force equation?
Image:
Change_in_Electrical_Potential (image/png)
Answer
  • Change in electrical potential
  • Change in pH
  • The Farraday constant

Question 9

Question
Put the Protonmotive force equation in order; Change in PMF = _ - (_ x _) A = Farraday constant B = Change in pH C= Change in electrical potential
Answer
  • C-B-A
  • B-C-A
  • A-B-C

Question 10

Question
Short circuiting the protonmotive force generation system causes the energy to be released as heat
Answer
  • True
  • False

Question 11

Question
The number of protons pumped in a full cycle is cell dependent
Answer
  • True
  • False
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