To determine which of the provided molecules are not building blocks of phospholipids, we first need to understand the components of phospholipids. Phospholipids are composed primarily of:

1. **Glycerol** - a backbone to which fatty acids and phosphate groups attach.
2. **Fatty Acids** - long hydrocarbon chains that form hydrophobic tails.
3. **Phosphate Group** - which is typically attached to the glycerol and can be further modified with other groups such as choline.

Based on this information:

1. **Glycerol** - Building block of phospholipids.
2. **Fatty Acid** - Building block of phospholipids.
3. **Choline** - Often part of the phosphatidylcholine molecule, modifies the phosphate group, thus it can be considered indirectly related.
4. **Long-Chain Alcohol** - Not a direct building block of phospholipids; phospholipids do not contain alcohols as structural components.
5. **Phosphoric Acid** - Part of the phosphate group essential to the structure of phospholipids.

### Final Answer
The molecule that is not a building block of phospholipids is **long-chain alcohol**.

Question

To determine which of the provided molecules are not building blocks of phospholipids, we first need to understand the components of phospholipids. Phospholipids are composed primarily of:

1. **Glycerol** - a backbone to which fatty acids and phosphate groups attach.
2. **Fatty Acids** - long hydrocarbon chains that form hydrophobic tails.
3. **Phosphate Group** - which is typically attached to the glycerol and can be further modified with other groups such as choline.

Based on this information:

1. **Glycerol** - Building block of phospholipids.
2. **Fatty Acid** - Building block of phospholipids.
3. **Choline** - Often part of the phosphatidylcholine molecule, modifies the phosphate group, thus it can be considered indirectly related.
4. **Long-Chain Alcohol** - Not a direct building block of phospholipids; phospholipids do not contain alcohols as structural components.
5. **Phosphoric Acid** - Part of the phosphate group essential to the structure of phospholipids.

### Final Answer
The molecule that is not a building block of phospholipids is **long-chain alcohol**.

Knowee AI · Accepted Answer

To determine which of the provided molecules are not building blocks of phospholipids, we first need to understand the components of phospholipids. Phospholipids are composed primarily of:

1. **Glycerol** - a backbone to which fatty acids and phosphate groups attach.
2. **Fatty Acids** - long hydrocarbon chains that form hydrophobic tails.
3. **Phosphate Group** - which is typically attached to the glycerol and can be further modified with other groups such as choline.

Based on this information:

1. **Glycerol** - Building block of phospholipids.
2. **Fatty Acid** - Building block of phospholipids.
3. **Choline** - Often part of the phosphatidylcholine molecule, modifies the phosphate group, thus it can be considered indirectly related.
4. **Long-Chain Alcohol** - Not a direct building block of phospholipids; phospholipids do not contain alcohols as structural components.
5. **Phosphoric Acid** - Part of the phosphate group essential to the structure of phospholipids.

### Final Answer
The molecule that is not a building block of phospholipids is **long-chain alcohol**.

Which of the following molecules are not building block of phospholipids?glycerolfatty acidcholinelong-chain alcoholphosphoric acid

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