Maps ! 1 F1 O A 1 tion N HO H HO HO 11 2 * F2 W S CHO command X )( # 3 CH₂OH H LU 80 F3 E OH H D H Classify the configuration of this enantiomer of glucose. 71 $ 4 C Ơ R F J( % 5 V F5 T Question 17 of 37 G ^ 6 B C F6 1/ Y H & 7 K F7 U N A) D B) L C) D, L D) L, D E) This monosaccharide contains no chiral centers * 00 8 J DII F8 I M ( 9 K 49 F9 O 1 ) O - 4 F10 command P A I' I 4 F11 L option + 11 = ? 11 I (4) F12 } +

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### Enantiomer of Glucose Configuration

**Question 17 of 37**

**Classify the configuration of this enantiomer of glucose:**

#### Structure Diagram:
A Fischer projection of an open-chain form of glucose is given. The structure is as follows (from top to bottom):

- **CHO** (Aldehyde group)
- Second carbon: Hydroxyl group (-OH) on the left, Hydrogen (H) on the right
- Third carbon: Hydrogen (H) on the left, Hydroxyl group (-OH) on the right
- Fourth carbon: Hydroxyl group (-OH) on the left, Hydrogen (H) on the right
- Fifth carbon: Hydroxyl group (-OH) on the left, Hydrogen (H) on the right
- **CH2OH** group at the bottom

#### Answer Options:
- **A) D**
- **B) L**
- **C) D, L**
- **D) L, D**
- **E) This monosaccharide contains no chiral centers**

This question assesses understanding of stereochemistry, particularly in classifying sugars as D or L based on the configuration of the chiral center furthest from the aldehyde or ketone group. 

**Note**: In this context, identifications such as "D" or "L" relate to the orientation of the hydroxyl group (-OH) on the chiral carbon farthest from the carbonyl group in the molecule.
Transcribed Image Text:### Enantiomer of Glucose Configuration **Question 17 of 37** **Classify the configuration of this enantiomer of glucose:** #### Structure Diagram: A Fischer projection of an open-chain form of glucose is given. The structure is as follows (from top to bottom): - **CHO** (Aldehyde group) - Second carbon: Hydroxyl group (-OH) on the left, Hydrogen (H) on the right - Third carbon: Hydrogen (H) on the left, Hydroxyl group (-OH) on the right - Fourth carbon: Hydroxyl group (-OH) on the left, Hydrogen (H) on the right - Fifth carbon: Hydroxyl group (-OH) on the left, Hydrogen (H) on the right - **CH2OH** group at the bottom #### Answer Options: - **A) D** - **B) L** - **C) D, L** - **D) L, D** - **E) This monosaccharide contains no chiral centers** This question assesses understanding of stereochemistry, particularly in classifying sugars as D or L based on the configuration of the chiral center furthest from the aldehyde or ketone group. **Note**: In this context, identifications such as "D" or "L" relate to the orientation of the hydroxyl group (-OH) on the chiral carbon farthest from the carbonyl group in the molecule.
**Title: Understanding D-Glucose in Haworth Projection**

**Question 18 of 37**

The Haworth projection of D-glucose is shown.

Question:
Which carbon is the anomeric carbon?

**Image Description:**
The image displays the Haworth projection of D-glucose. The projection is a cyclic form of glucose showing the following structure:

- The ring consists of five carbon atoms and one oxygen atom.
- The carbons in the ring are numbered from 1 to 6.
  - Carbon 1 (C1) is connected to an "OH" (hydroxyl) group pointing down and a hydrogen (H) pointing up.
  - Carbon 2 (C2) is connected to an "H" pointing up and an "OH" group pointing down.
  - Carbon 3 (C3) is connected to an "H" pointing down and an "OH" group pointing up.
  - Carbon 4 (C4) is connected to an "OH" group pointing down and an "H" pointing up.
  - Carbon 5 (C5) is connected to a methanol group (CH2OH) pointing up.
  - Carbon 6 (C6) is part of the methanol group (CH2OH) extending from C5.
  - The oxygen atom forms part of the ring structure, located between C1 and C5.

**Answer Choices:**
A) 1
B) 2
C) 3
D) 4
E) 5

**Explanation:**
In the context of this question, the anomeric carbon is the carbon atom in a sugar that was originally the carbonyl carbon (the aldehyde or ketone group) in the straight-chain form of the sugar molecule. In the cyclic (Haworth) structure of glucose, this is Carbon 1 (C1).

**Correct Answer:**
A) 1
Transcribed Image Text:**Title: Understanding D-Glucose in Haworth Projection** **Question 18 of 37** The Haworth projection of D-glucose is shown. Question: Which carbon is the anomeric carbon? **Image Description:** The image displays the Haworth projection of D-glucose. The projection is a cyclic form of glucose showing the following structure: - The ring consists of five carbon atoms and one oxygen atom. - The carbons in the ring are numbered from 1 to 6. - Carbon 1 (C1) is connected to an "OH" (hydroxyl) group pointing down and a hydrogen (H) pointing up. - Carbon 2 (C2) is connected to an "H" pointing up and an "OH" group pointing down. - Carbon 3 (C3) is connected to an "H" pointing down and an "OH" group pointing up. - Carbon 4 (C4) is connected to an "OH" group pointing down and an "H" pointing up. - Carbon 5 (C5) is connected to a methanol group (CH2OH) pointing up. - Carbon 6 (C6) is part of the methanol group (CH2OH) extending from C5. - The oxygen atom forms part of the ring structure, located between C1 and C5. **Answer Choices:** A) 1 B) 2 C) 3 D) 4 E) 5 **Explanation:** In the context of this question, the anomeric carbon is the carbon atom in a sugar that was originally the carbonyl carbon (the aldehyde or ketone group) in the straight-chain form of the sugar molecule. In the cyclic (Haworth) structure of glucose, this is Carbon 1 (C1). **Correct Answer:** A) 1
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