biochemistry decks question

[econservative]

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Which of the following components of the electron transport chain only accepts electrons

A. FMN
B. Coenzyme Q( ubiquinone)
C. cyrochrome b
D. oxygen

please explain the answer as according to me it is the complex-2 which only accepts eletrons and doesnot transport hydrogen ions
😕

 

[impaction]

Which of the following components of the electron transport chain only accepts electrons

A. FMN
B. Coenzyme Q( ubiquinone)
C. cyrochrome b
D. oxygen

please explain the answer as according to me it is the complex-2 which only accepts eletrons and doesnot transport hydrogen ions
😕

for me the question looks incomplete,
as A B C all accept electrons and oxygen is not a part of the chain,,

 

[econservative]

this is the dental decks question( straight away given in dental decks as a main quetion) as it is copied from there and it in the topics of enzymes in dental decks 😡

 

[I'mFillingFine]

Which of the following components of the electron transport chain only accepts electrons

A. FMN
B. Coenzyme Q( ubiquinone)
C. cyrochrome b
D. oxygen

please explain the answer as according to me it is the complex-2 which only accepts eletrons and doesnot transport hydrogen ions
😕

I agree that if complex 2 had been a choice, that'd be it. Perhaps in this case they want you to say O2 because it does nothing besides accept those terminal electrons. Is that what the card says is the answer?

 

[Ibanez]

Which of the following components of the electron transport chain only accepts electrons

A. FMN
B. Coenzyme Q( ubiquinone)
C. cyrochrome b
D. oxygen

please explain the answer as according to me it is the complex-2 which only accepts eletrons and doesnot transport hydrogen ions
😕

Cyt. b

• NADH gives out HYDRIDE ion, and not an electron, to Complex 1. The e- is transported further and the hydrogen is taken up by FMN and is reduced to FMNH2. Option 1 is invalid.
• O2 ACCEPTS Hydrogen; THE BY-PRODUCT is WATER in oxidative phosphorylation. Option 4 is invalid.
• And no ETC complex is intimately related to H+ pumps, it is ONLY because of the gradient that is created with the transport of e- and NOT BECAUSE OF THE PARTICIPATION of H+ in ETC. It plays a passive role. And is hypothetical, though widely accepted (but not yet proved!)
• UBIQUINONE accepts the hydrogen from FMNH2 and is REDUCED. (FMNH2-->FMN + H2)
• Cyt b accepts ELECTRON from ubiquinone. (The previously reduced ubiquinone is oxidized back to Q; and the H+ from Ubiquinone adds to the gradient and is transported to mitochondrial matrix where it reacts with O2 to form H2O)

I've answered this to "almost" best of my ability... (Damn I need some sleep!)

Mayank.

PS *Sprechgesang* I want my MTV, uh no I meant my Nobel Prize. I want my Noble Prize.🙄

 

[econservative]

thanxs a lot Ibanez for explaning this answer in detail



Cyt. b

• NADH gives out HYDRIDE ion, and not an electron, to Complex 1. The e- is transported further and the hydrogen is taken up by FMN and is reduced to FMNH2. Option 1 is invalid.
• O2 ACCEPTS Hydrogen; THE BY-PRODUCT is WATER in oxidative phosphorylation. Option 4 is invalid.
• And no ETC complex is intimately related to H+ pumps, it is ONLY because of the gradient that is created with the transport of e- and NOT BECAUSE OF THE PARTICIPATION of H+ in ETC. It plays a passive role. And is hypothetical, though widely accepted (but not yet proved!)
• UBIQUINONE accepts the hydrogen from FMNH2 and is REDUCED. (FMNH2-->FMN + H2)
• Cyt b accepts ELECTRON from ubiquinone. (The previously reduced ubiquinone is oxidized back to Q; and the H+ from Ubiquinone adds to the gradient and is transported to mitochondrial matrix where it reacts with O2 to form H2O)

I've answered this to "almost" best of my ability... (Damn I need some sleep!)

Mayank.

PS *Sprechgesang* I want my MTV, uh no I meant my Nobel Prize. I want my Noble Prize.🙄[/quote]

 

[Ibanez]

thanxs a lot Ibanez for explaning this answer in detail

You're welcome! By the way I'm Mayank (Ibanez is the silly guitar brand I own and despise 😱)

Mayank.

PS I wish I could change my screen-name.
PSS I don't own the brand, I just have one piece.

 

[impaction]

keep hopes dude, you can own it one day

You're welcome! By the way I'm Mayank (Ibanez is the silly guitar brand I own and despise 😱)

Mayank.

PS I wish I could change my screen-name.
PSS I don't own the brand, I just have one piece.

 

[Ibanez]

keep hopes dude, you can own it one day

I'll own Les Paul or Gibson if given a chance, but "Ibanez" can suffer...

My hope is cold, my faith is gone!
25 days till death (thanks to NBDE Part 1) do me apart... 😛
I've lost count of the days remaining for my exam, maybe "28" and not 25?

Mayank.

 

[simkarl]

I'll own Les Paul or Gibson if given a chance, but "Ibanez" can suffer...

My hope is cold, my faith is gone!
25 days till death (thanks to NBDE Part 1) do me apart... 😛
I've lost count of the days remaining for my exam, maybe "28" and not 25?

Mayank.

hey The Lord of Tragedy thanks for explanation and worm up and count down.. and .cheer up ..