Question

What stage of cellular respiration produces the most ATP?

A Electron transport chain
B Glycolysis
C Krebs cycle
D Fermentation

Answer 1

A The Electron Transport process is the third process in cell respiration, it requires oxygen directly. The electron transport "chain" is a series of electron carriers in the membrane of the mitochondria. Through a series of reactions, the "high energy" electrons are passed to oxygen. In the process, a gradient is formed, and ultimately ATP (Adinosine triphosphate), an energy molecule is formed.Therefore this stage produces the most ATP.

Answer 2

o ok i got. can you help with one more?

Answer 3

I can try :)

Answer 4

Alcoholic fermentation

A forms fewer ATP molecules than cellular respiration
B uses oxygen and ATP molecules as reactants
C occurs in the muscle cells of animals and humans
D gives off carbon dioxide and NADH as products

Answer 5

D. http://www.phschool.com/science/biology_place/biocoach/cellresp/review5b.html

Answer 6

D. for sure!

Answer 7

thank you both :)

Answer 8

its not D :(

Answer 9

Any time :)

Answer 10

That's weird, can you retry the question?

Answer 11

on the test it just said
"Alcoholic fermentation

A forms fewer ATP molecules than cellular respiration
B uses oxygen and ATP molecules as reactants
C occurs in the muscle cells of animals and humans
D gives off carbon dioxide and NADH as products"

Answer 12

Ok well I think it's B, since it's not D.

Answer 13

ALCOHOLIC fermentation

Answer 14

from name itself you can get that one of end products is alcohol -thats number 1
number 2- fermentation can never occur IN PRESENCE OF OXYGEN
coz when oxygen is present then we can just undergo normal respiration and produce a lot of ATPs
now the the difference between normal respiration and fermentation is that in normal respiration (aerobic meaning) majority of ATP are produced through Electron transport chain
and electron transport chain requires Oxygen as its final electron acceptor
but when there is no oxygen then there is no Electron transport chain step - and instead it leads to different ending - which is fermentation
thus number of ATP produced by fermentation is less compared to when there is normal aerobic respiration where there IS electron transport chain step

Answer 15

its not D because CO2 and NADH is NOT final product
now its not C because there are a lot of microorganisms that do alcoholic fermentation while they have no muscle cells like animals and humans (yeast for example)