focus study

Question 1

So why do we need to breathe O 2 ?

Answer 1

 Without O 2 , there would be no acceptor of e - at the end of the E.T.C.
 Electrons would back up, protons would not be pumped to create the
concentration gradient, there would be no ATP production and NADH and
FADH 2 would not be able to drop off e - ’s

Question 2

So why do we need food?

Answer 2

 Without food, there would be no source of e - ’s

Question 3

What is photosynthesis and is it stored energy or released

Answer 3

the process by which cells synthesise organic molecules (e.g. glucose) from inorganic molecules (CO2 and H2O) in the presence of sunlight.

stored