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

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Discussion Overview

The discussion centers on the relationship between amylose and amylopectin in starch formation, specifically addressing the energy dynamics involved in the condensation process that leads to their formation. Participants explore the nature of condensation reactions and the energy changes associated with bond formation and breaking.

Discussion Character

  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants question the statement that "formation of amylose and amylopectin releases energy," seeking clarification on what is meant by this formation.
  • One participant asserts that condensation reactions require energy, challenging the idea that energy is released during the formation of amylose and amylopectin.
  • Another participant emphasizes that condensation involves forming bonds between molecules, which they believe should release energy, but acknowledges the complexity of the process.
  • A later reply explains that while bond formation can release energy, bonds are also broken during condensation, which complicates the energy dynamics.
  • Participants discuss the example of ATP, noting that not all bond formations release energy, highlighting the nuances in energy changes during biochemical reactions.

Areas of Agreement / Disagreement

Participants express differing views on whether the condensation process involved in forming amylose and amylopectin releases energy. The discussion remains unresolved, with competing perspectives on the energy dynamics of bond formation and breaking.

Contextual Notes

There are limitations in the discussion regarding the assumptions about energy changes in biochemical reactions, particularly the conditions under which energy is released or required during condensation reactions.

wenxian
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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?? :confused:
 
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wenxian said:
if so,the process of condensation release energy, isn't it?? :confused:

No, condensation reactions require energy.
 
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?
 
wenxian said:
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.
 
thank you so muc!
i have got what u were trying to explain to me..:smile:
 

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