Beta barrels are present in mitochondria.The formation of a concentration gradient in the mitochondria is necessary for the efficient creation of ATP, such as hydrogen channels, but is this what these β-barrels are involved in, or do they have some other function?
Beta barrels:
These are the structures of large beta-sheet that twists and coils to form a closed structure in which the first strand is hydrogen bonded to the last. the strands in beta-barrels are typically arranged in an antiparallel fashion.
Types of beta barrels:
There are two types of beta barrels:
1. Up-and-down beta barrel
These are the simplest barrel topology and consist of a series of beta strands, each of which is hydrogen-bonded to the strands immediately before and after it in the primary sequence.
2. Jelly roll beta barrel
These beta barrels also known as the Swiss roll, is a complex nonlocal structure in which four pairs of antiparallel beta sheets, only one of which is adjacent in sequence, are "wrapped" in three dimensions to form a barrel shape.
Functions of beta barrels in mitochondria
A part from formation of a concentration gradient in the mitochondria for the creation of ATP beta barrela have following function in mitochondria.
Beta barrels are present in mitochondria.The formation of a concentration gradient in the mitochondria is necessary...
What supports the contention that proton gradient drives ATP formation in mitochondria? Explain the process of ATP synthesis?
What evidence supports the contention that the proton gradient drives ATP formation in mitochondria? Give at least 2 lines of evidence.
why was it necessary to
isolate mitochondria to study and also use engineered vesicles that
either did or did not contain atp synthetase?
by the first ATP s r aasing the enzyme to function as an ATPase and result in ATP ATP synthase would likely drive the ATP synh reverse direction, s Original Paper The oniginal experiments on pli and ATP formation were donc on chloroplasts The chemiosmotic generation of ATP is simila to mitochondria, but occurs across tihe thylašoid...
explain how oxygen is used to create a concentration gradient in the mitochondria. raw a picture of where the hydrogen ions (H+ are, where they go, and why there movement is important). What is the role of oxygen in this process?
Q1. Which of the following apply to cellular respiration? (Select ALL that apply.) A. Cellular respiration uses sunlight to convert low energy carbon dioxide into high energy sugar molecules. B. Cellular respiration breaks down high energy sugars thereby releasing energy for the cell to do work. C. Cellular respiration stores the energy from sugar in the form of ATP. D. Cellular respiration consumes O2 and releases CO2. Q2. Why is oxygen required for life? Select ONE option: A. It facilitates...
Investigate short-chain (12 carbons or less) fatty acid metabolism: Monitor ketone body formation in the blood Results: Interestingly, when Jessie was fed a solution containing short-chain fatty acids and again fasted, plasma acetoacetate and γ-hydroxybutyrate concentrations increased. 15. What does this result tell you about Jessie? A. Nothing B. Something, but not clear what C. One of the enzymes of the β-oxidation pathway must be deficient D. There must be a problem with specifically long-chain fatty acid transport, not with...
Q2.
The release of ATP by the beta subunit is most directly
dependent on:
Select ONE option:
1. the flow of protons from the intermembrane space to the
matrix.
2. the rotation of the c-ring in the membrane.
3. the passage of electrons along the electron transport
chain.
4. a conformational change in the beta subunit.
Q3.
What defines the direction of rotation of the c-ring in the F0
complex?
(Select ALL that apply.)
1. Amino acids side chains in...
mestion Completion Status: Why did I suggest that the secret to life is electrons and protons? A. Because redox reactions are necessary for all of the reactions in live cells and these redox reactions require both H+ and electrons B. Because electrons carry a negative charge and protons have a positive charge C. Because most (not all) cells need electron transport and H+ gradients to make ATP D. Because electrons are necessary for the electrical responses of the cell (like...
Problem: When alpha-iron is subjected to an atmosphere of hydrogen gas, the concentration of hydrogen in the iron, CH (in weight percent), is a function of hydrogen pressure, PH2 (in Mpa), and asbsolute temperature (T) according to Ch= 1.34 x 10-2 sqrt(PH) exp(- (27.2KJ/mol) /RT) Consider a thin iron membrane with the thickness and temperature listed below. Calculate the flux in (kg/(m²-s)) through this membrane if the hydrogen pressure on one side of the membrane is 0.17 MPa, and on...
20) - 24) Diffusion is a process by which a substance A) goes down its concentration gradient. B) goes from lesser to greater concentration C) goes up its concentration gradient D) is at equilibrium 25 25) What product(s) do plants produce during photosynthesis that is/are used by humans and other animals? A) glucose B) carbon dioxide C) oxygen D) glucose and oxygen 26) The term that describes the diffusion of water is A) simple diffusion. B) equilibrium C) facilitated diffusion...