Metabolism - III

Question 1

what is the difference between inorganic and organic molecules

Answer 1

organic - contain C-H bonds an often have functional groups

inorganic - do NOT contain C-H bond

Question 2

what makes the best fuel for chemolithotrophy

Answer 2

ammonia - good electron donor / more reduced (give to ETC)
* no oxygens

Question 3

what has the best potential to act as a final electron acceptor for chemolithotrophs

Answer 3

nitrate - more oxidized and can receive electrons the best

Question 4

energy generation by chemolithotrophs begins at

Answer 4

the ETC

Question 5

what don’t chemolithotrophs make?

Answer 5

NADH or NADPH
(don’t do TCA cycle)

Question 6

how do chemolithotrophs make NADH/NADPH

Answer 6

reverse electron transport chain
*H pumped back into cell(cytosol)
* requires ATP via proton gradient (doesn’t make it)

Question 7

_____ is a essential part of biogeochemical cycling

Answer 7

catabolism

Question 8

what actions of microbes are particularly important for biogeochemical cycling

Answer 8

important for decomposition and nutrients

Question 9

_____ is a chemolithotrophic process that can only be done by microbes and can be done by….

Answer 9

nitrification
- ammonia (NH3) to nitrate (NO3-)m

done by comammox can do it all but themselves

Question 10

what are known as “rock eating” and where are they found

Answer 10

chemolithotrophs

found in extreme environments
- hydrothermal vents
- wastewater treatment plants