Which of the following membranes would be the least fluid? b) a) OH CH₂ (n) CH3+ 01C .O. CH₂ (n) CH3

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question:**
Which of the following membranes would be the least fluid? 

**Options:**

**a)**
```
        O
        ||
    O--C
        |
     CH2 (n)
        |
     CH3+
```

**b)**
```
        O
        ||
     O--C
        |
    CH2 (n)
        |
     CH3  
```
       
**c)**
```
        O
        ||
    O--C
        |
     CH2 (n)
        |
     CH3  
```
      
**d)**
```
        O
        ||
     O--C
        |
    CH2 (n)
        |
     CH3  
```

**Explanation:**

The question presents four different molecular structures, labeled as options a), b), c), and d). Each structure is a schematic representation of a membrane component. The task is to identify which of the given membranes would exhibit the least fluidity.

1. **Option a)** features a carboxylic acid group (–COOH) at the end, followed by a hydrocarbon chain. Notably, a methyl group (CH3) bears a positive charge at the end of the chain.
2. **Option b)** depicts a deprotonated carboxylate group (–COO-) at the end, followed by a hydrocarbon chain with a neutral methyl group (CH3) at its end.
3. **Option c)** shows a carboxylic acid group (–COOH) at the end, similar to option a), followed by a hydrocarbon chain and a neutral methyl group (CH3) at its end.
4. **Option d)** illustrates a deprotonated carboxylate group (–COO-) at the end, similar to option b), followed by a hydrocarbon chain and a neutral methyl group (CH3) at its end.

To determine membrane fluidity, one should consider the saturation level of the hydrocarbon chains, the presence of double bonds, and the type of terminal functional groups. Saturated chains (no double bonds) and tightly packed structures tend to be less fluid.

Based on these considerations, options b) and d) are more likely to be less fluid due to the presence of negatively charged carboxylate groups (–COO-), which can form stronger interactions (like ionic bonds or hydrogen bonds) compared to the neutral group structures
Transcribed Image Text:**Question:** Which of the following membranes would be the least fluid? **Options:** **a)** ``` O || O--C | CH2 (n) | CH3+ ``` **b)** ``` O || O--C | CH2 (n) | CH3 ``` **c)** ``` O || O--C | CH2 (n) | CH3 ``` **d)** ``` O || O--C | CH2 (n) | CH3 ``` **Explanation:** The question presents four different molecular structures, labeled as options a), b), c), and d). Each structure is a schematic representation of a membrane component. The task is to identify which of the given membranes would exhibit the least fluidity. 1. **Option a)** features a carboxylic acid group (–COOH) at the end, followed by a hydrocarbon chain. Notably, a methyl group (CH3) bears a positive charge at the end of the chain. 2. **Option b)** depicts a deprotonated carboxylate group (–COO-) at the end, followed by a hydrocarbon chain with a neutral methyl group (CH3) at its end. 3. **Option c)** shows a carboxylic acid group (–COOH) at the end, similar to option a), followed by a hydrocarbon chain and a neutral methyl group (CH3) at its end. 4. **Option d)** illustrates a deprotonated carboxylate group (–COO-) at the end, similar to option b), followed by a hydrocarbon chain and a neutral methyl group (CH3) at its end. To determine membrane fluidity, one should consider the saturation level of the hydrocarbon chains, the presence of double bonds, and the type of terminal functional groups. Saturated chains (no double bonds) and tightly packed structures tend to be less fluid. Based on these considerations, options b) and d) are more likely to be less fluid due to the presence of negatively charged carboxylate groups (–COO-), which can form stronger interactions (like ionic bonds or hydrogen bonds) compared to the neutral group structures
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