Question

a) Describe the structure of the ATP and GTP molecule.

b) Explain how chemiosmosis produces ATP.

c) Describe two specific cell processes that require ATP and explain how ATP is used in each process.

Answer 1

Any help, would be thoroughly appreciated; and my gratitude would of course be followed by a shiny medal.

Answer 2

a) adenine bonded to a ribose molecule bonded to three phosphate groups (Adenosine triphosphate). I'm not sure how to 'describe it' short of drawing it though...GTP is similar as it's Guanine-ribose-triphosphate.
b) As the cytosol in cells has a lower amount of hydrogen ions inside than the outside of the cell. The hydrogen ion movement back into the cell can be used to form ATP (with ATP synthase). Sorry! I can't really go into more detail than that without trying to decipher the wiki article.
c)...will post in a mo!

Answer 3

c) okay sorry for going the wikipedia way with this one, So "carbon fixation" uses ATP

"[CO2 fixation] process uses the ATP and NADPH produced by the photosynthetic reaction centres to convert CO2 into glycerate 3-phosphate, which can then be converted into glucose. This carbon-fixation reaction is carried out by the enzyme RuBisCO as part of the Calvin – Benson cycle." (take a look for full description: http://en.wikipedia.org/wiki/Calvin_cycle )

Gluconeogenesis also uses ATP (okay sounds scary, is just production of glucose) http://en.wikipedia.org/wiki/Gluconeogenesis

this is hard, I usually only think about energy production, not usage! Hope someone can give you a better answer :)

Answer 4

I lubb you :3

Answer 5

lol thanks :P