Ch 14HW Living things conserve energy by moving electrons around. Most microbes
ID: 193791 • Letter: C
Question
Ch 14HW Living things conserve energy by moving electrons around. Most microbes transter electrons to soluble 1 of 19 such as metalic acceptors, such as O2 or NO that have been taken up by the cell Some microbes, such as contain SRB, their symbiotic rom ANME and use them to reduce sulifate, thereby conserving enough energy to support both symbiotic partners of part of an but in the that underlies this symbiotic Here is where the SR8 partners help out. The SRB take syntrophic partnerships, H2 is the "currency" of electron transfer, being produced by one partner and consumed by organisms i, this rtimate symbosis survive by plugging into an extraceuar matror of tny wre ke cturos that allow electrons has long been a mystery. In most 1 [HI, and cytochrome cExplanation / Answer
Picture 1
A. Anaerobic H2 oxidation
Require hydrogenase enzyme
Most efficient in micro aerophilic environment
Reason : Microbes that obtain energy by oxidation of electron donors (H2) are chemotrophs. In this, the enzyme hydrogenase is utilized and ATP is regenerated. These organisms grow well in microaerophilic environment.
B. Direct electron transfer through nanowires
Involves use ofo pili that connects cytochrome
C. Fermentation
NADH donates electron to an organic molecule.
Reason : NADH from glycolysis will not donate electron to electron transport chain to regenerate NAD+. The electron is transferred to an organic molecule.
D. Anaerobic respiration
Involves electron transport chain with an exogenous electron acceptor
Reason : In this metabolism, the fuel molecule will transfer its electron to electron acceptors like sulfate, nitrate and so on through electron transport chain. This will not happen in aerobic respiration.
Picture 2
Methanogens :
Anaerobic archway
Produce CH4 (methane)
Use CO2, methyl compounds and acetate
Methylotrophs
Can be autographs
May include ANME (anaerobic methanotrophs)