Another example of a 4 point question: Question: A particularly artsy scientist

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Another example of a 4 point question: Question: A particularly artsy scientist accidentally discovered a new species of archaea that could survive inside his pottery furnace when he found them growing inside his pottery immediately after firing What are some possible features of the species' cell membrane that might allow it to survive the extreme heat and oxidizing atmosphere? Answer: It is likely to be composed mostly (if not completely) of fully saturated lipids helping to keep the Tm high and keeping the cell and membrane intact at higher temperatures. It will also have branched alkyl chains making it resistant to oxidation, as the branches limit access for oxidizing agents to attack carbons on the chain. mple of a 2 point question:

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Question: Electron transport chain contains a sequence of electron carriers that transfer electrons from NADH/FADH2 to molecular oxygen. How many electron carrier proteins/complexes are present in ETC. NADH produces 2.5 ATP while FADH2 produces only 1.5 ATP in electron transport chain. Why? Which component of the electron transport chain can move between two carrier proteins? Which component of the electron transport chain is also involved in the TCA cycle.

Answer:
There are complexes in the electron transport chain.
i. Complex-I
ii. Complex-II
iii. Complex-III
iv. Complex-IV

NADH enters at complex-I whereas FADH2 enters at Complex-II. Hence FADH2 can transport less number of protons across the membrane and thereby less ATP production.
Succinate dehydrogenase (complex-II) is involved in both ETC and TCA cycle.
Cytochrome-c can move between two carrier proteins?

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