Question

1) The electron transport chain leads to the production of:

a) H₂O and ATP

b) ATP only

c) sugar

d) NADH

e) unpaired electrons

2) Sugars are held together by:

a) ester bonds

b) hydrogen bonds

c) peptide bonds

d) all of the above

e) none of the above

3) ATP synthase:

a) Transports electrons against a concentration gradient.

b) Transports hydrogen ions against a concentration gradient

c) Transports electrons with/down a concentration gradient

d) Transports hydrogen ions with/down a concentration gradient

e) Transports oxygen to be the electron acceptor

Answer 1

Answer 1(a)

Electron transport chain is a series of electron transporter,present in inner mitochondrial membrane.In this process electron are pumped to the inter membrane space.Oxygen is reduced to form water and H+ ions provide power to ATP synthase to convert ADP into ATP.

Answer 2(e)

Sugars are held together by glycosidic bond,when this bond in form ,water molecule is removed.This reaction is known as condensation reaction or dehydration reaction.

Answer 3(d)

ATP synthase transport hydrogen ions with/down a concentration gradient.Hydrogen ions get accumulates in mitochondrial matrix and thus a concentration gradient develop in which hydrogen ion diffuses out of the matrix space through ATP synthase.ATP synthase convert ADP into ATP.