help with biology. its very hard to me?

Question

-describe why exocytosis requires ATP energy
-what is the main energy source for atp formation?
-what 2 parts must be combined to make ATP?
-a diagram showing the atp-adp cycle
-what element is found in adenine that is not found in carbohydrates?
-what element is found in carbohydrates that is not found in adenine?

Answer 1

The system of ATP and water under standard conditions and concentrations is extremely rich in chemical energy; the bond between the second and third phosphate groups is loosely said to be particularly high in energy. Strictly speaking, the bond itself is not high in energy (like all chemical bonds it requires energy to break), but energy is produced when the bond is broken and water is allowed to react with the two products. Thus, energy is produced from the new bonds formed between ADP and water, and between phosphate and water. The net change in enthalpy at Standard Temperature and Pressure of the decomposition of ATP into hydrated ADP and hydrated inorganic phosphate is -20.5 kJ / mole, with a change in free energy of 3.4 kJ/mole. This large release in energy makes the decomposition of ATP in water extremely exergonic, and hence useful as a means for chemically storing energy.
ATP can be produced by a number of distinct cellular processes; the three main pathways used to generate energy in eukaryotic organisms are glycolysis, the citric acid cycle/oxidative phosphorylation, and beta-oxidation

ADP combined with phosphate group forms ATP

Carbohydrates or saccharides are simple molecules that are straight-chain aldehydes or ketones with many hydroxyl groups added, usually one on each carbon atom that is not part of the aldehyde or ketone functional group.
Adenine is a purine (Purine is a heterocyclic aromatic organic compound, consisting of a pyrimidine ring fused to an imidazole ring).

Answer 2

1_ because in exocytosis, the cell should use some energy to be able to pass the subectace out of cell, it is because of many reasons. one reason is that the subestances may be use vacuel to reach to cell membran, after that conjugation between the vacuel membran and cell memebran need energy.( u know this is just one way to get out)
2_the main enery of body is from fatty acid and glycose.
but some parts of body just use from glycose.like brain.
3_ during glycosis and accid citric recycle. and Oxidation phosphrolisis. glycosis made the pyrovate and in mitocondry it will return to acetil_coa
after that accetil_coa in the accid citric accid will produce NADH and FADH2 .
from NADH , 3/5 ATP and from FADH2 2/5 ATP will be produce.
in end , NADH and FADH2 in the mitocondry will prouce ATP.
4_ i am not sure , about last question, but i know that charbohydrate is made up from , hydrogen, oxigen, and carbon.

and adenine, is a base, and is made up from: nitrogen, carbon, and oxigen,

then may be the answer is nitrogen.

Answer 3

Help! I am a lazy ***.