Figone 7-4 애 5 Home 3 '애 애 x-glucose 애 근 애 6 Ho 5 4 open 애 3 애 It 200volt 애 chain ㄹ OH How.s 3 애 애 "애 B-glucose

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**Figure 7-4: Glucose Structures**

The illustration shows the three structural forms of glucose: α-glucose, open chain, and β-glucose. Each form represents the different configurations glucose can take in solution.

1. **α-Glucose:**
   - This cyclic structure is in the form of a six-membered ring or pyranose form.
   - The hydroxyl group (-OH) on the first carbon is positioned downward (axial position).
   - Carbons are numbered from 1 to 6, with associated hydrogen and hydroxyl groups shown.
   - The ring contains five carbon atoms and one oxygen atom.

2. **Open Chain:**
   - The linear form of glucose, also known as acyclic.
   - The carbon atoms are arranged in a straight chain from 1 to 6.
   - Carbon 1 has an aldehyde group (-CHO), and other carbons have hydroxyl groups (-OH) attached.
   - This is the form in which glucose acts as an aldehyde.

3. **β-Glucose:**
   - Also a cyclic pyranose form, similar to α-glucose.
   - The hydroxyl group on carbon 1 is positioned upward (equatorial position).
   - This configuration differs from α-glucose in the orientation of the hydroxyl group on carbon 1.

The reversible arrows between the diagrams indicate that glucose can interconvert between these forms in solution.
Transcribed Image Text:**Figure 7-4: Glucose Structures** The illustration shows the three structural forms of glucose: α-glucose, open chain, and β-glucose. Each form represents the different configurations glucose can take in solution. 1. **α-Glucose:** - This cyclic structure is in the form of a six-membered ring or pyranose form. - The hydroxyl group (-OH) on the first carbon is positioned downward (axial position). - Carbons are numbered from 1 to 6, with associated hydrogen and hydroxyl groups shown. - The ring contains five carbon atoms and one oxygen atom. 2. **Open Chain:** - The linear form of glucose, also known as acyclic. - The carbon atoms are arranged in a straight chain from 1 to 6. - Carbon 1 has an aldehyde group (-CHO), and other carbons have hydroxyl groups (-OH) attached. - This is the form in which glucose acts as an aldehyde. 3. **β-Glucose:** - Also a cyclic pyranose form, similar to α-glucose. - The hydroxyl group on carbon 1 is positioned upward (equatorial position). - This configuration differs from α-glucose in the orientation of the hydroxyl group on carbon 1. The reversible arrows between the diagrams indicate that glucose can interconvert between these forms in solution.
### Question

**See Figure 7-4 Which carbon in glucose is achiral in all three structures?**

### Answer Choices

- ○ 1
- ○ 2
- ○ 3
- ○ 4
- ○ 5
- ○ 6

(Note: The question refers to Figure 7-4 which is not provided here. An understanding of glucose's structure may be necessary to answer this question.)
Transcribed Image Text:### Question **See Figure 7-4 Which carbon in glucose is achiral in all three structures?** ### Answer Choices - ○ 1 - ○ 2 - ○ 3 - ○ 4 - ○ 5 - ○ 6 (Note: The question refers to Figure 7-4 which is not provided here. An understanding of glucose's structure may be necessary to answer this question.)
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