What is the Relationship Between Amylose and Amylopectin in Starch Formation?

[wenxian]

based on the statement~ '' Formation of amylose and amylopectin release energy.. ''
and i was told tat this statement is incorrect..
wat is meant by " formation of amylose and amylopectin " ? Is this a condensation of starch?
if so,the process of condensation release energy, isn't it??

 

[mishrashubham]

if so,the process of condensation release energy, isn't it??

No, condensation reactions require energy.

 

[wenxian]

i m so sorry that i could not understand..
condensation is a process to form bond between diff molecules to become an even more complex structure..
so, bond formation release energy,isn't it?

 

[mishrashubham]

i m so sorry that i could not understand..
condensation is a process to form bond between diff molecules to become an even more complex structure..
so, bond formation release energy,isn't it?

Yes but bonds are also broken in the process. A glycosidic linkage requires the net breaking of OH from one monomer and an H from an OH of the other.

Btw, all bond formation does not release energy. An obvious example is ATP. ATP --> ADP + Pi releases energy because in ATP the covalent bond between the phosphates was strained due to like charge repulsion and there is also a net increase in entropy in ADP due to increased spatial randomization of the molecule.

 

[wenxian]

thank you so muc!
i have got what u were trying to explain to me..