From left to right, what functional groups are present in thyroxine? OH CH2CH2CHCHCHCNH2 но A) phenol, alcohol, ketone, amine B) phenol, alcohol, amide C) alcohol, arene, alcohol, ether D) phenol, alcohol, amine

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### Question 22

**From left to right, what functional groups are present in thyroxine?**

Below is the chemical structure of thyroxine:

```
          OH
          |
  HO — C₆H₄ — CH₂CH₂CHCHCHNH₂
                           |
                           O
```

#### Options:
- **A) phenol, alcohol, ketone, amine**
- **B) phenol, alcohol, amide**
- **C) alcohol, arene, alcohol, ether**
- **D) phenol, alcohol, amine**

#### Answer Choices:
- ( ) A
- ( ) C
- ( ) B
- ( ) D

### Diagram Explanation:
The image contains a chemical structure, specifically that of thyroxine, which includes various functional groups. In thyroxine's structure:
- The benzene ring with a hydroxyl group attached signifies a **phenol** group.
- The hydroxyl (OH) group outside the ring indicates an **alcohol** group.
- The C=O group connected to a nitrogen (NH₂) represents an **amide** group.

Thus, the correct answer is **B) phenol, alcohol, amide**.
Transcribed Image Text:### Question 22 **From left to right, what functional groups are present in thyroxine?** Below is the chemical structure of thyroxine: ``` OH | HO — C₆H₄ — CH₂CH₂CHCHCHNH₂ | O ``` #### Options: - **A) phenol, alcohol, ketone, amine** - **B) phenol, alcohol, amide** - **C) alcohol, arene, alcohol, ether** - **D) phenol, alcohol, amine** #### Answer Choices: - ( ) A - ( ) C - ( ) B - ( ) D ### Diagram Explanation: The image contains a chemical structure, specifically that of thyroxine, which includes various functional groups. In thyroxine's structure: - The benzene ring with a hydroxyl group attached signifies a **phenol** group. - The hydroxyl (OH) group outside the ring indicates an **alcohol** group. - The C=O group connected to a nitrogen (NH₂) represents an **amide** group. Thus, the correct answer is **B) phenol, alcohol, amide**.
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