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BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter3: Molecules Of Life

Section: Chapter Questions

Problem 13SA

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Draw the electron pushing mechanism

The image depicts a chemical reaction involving glucose. On the left is a linear structure of glucose with aldehyde and hydroxyl groups along the chain. An arrow points to the right, where another structure is shown along with carbon dioxide (CO₂).

Starting with the structure on the left:
- It is a glucose molecule, represented in its open-chain form.
- The top of the molecule has a negatively charged carboxylate group (−COO⁻).
- A series of carbon atoms are connected in a chain, each bonded to hydrogen (H) and hydroxyl (OH) groups.

The structure on the right:
- This represents the breakdown product of glucose, possibly indicating the first step in the cellular respiration process.
- The molecule shown is a simple sugar with hydroxyl groups and a single ketone group.
- Carbon dioxide (CO₂) is shown as a separate product of this reaction.

This illustration demonstrates the decarboxylation of glucose, which is an essential step in metabolic pathways such as glycolysis and respiration.

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