Polysaccharides, polypeptides, and polynucleotides have in common that they all -

Options

A. contain amino acids
B. Are formed in condensation reactions
C. Contain nitrogen
D. Come out in acid soluble pool

Answer

To answer the question about what polysaccharides, polypeptides, and polynucleotides have in common, we will analyze each option provided and determine which is applicable to all three biomolecules.

### Step-by-Step Solution:

1. **Understanding the Structures**:
- **Polysaccharides**: These are long chains of monosaccharides (sugars) linked together. Examples include starch and cellulose.
- **Polypeptides**: These are chains of amino acids linked by peptide bonds. They are the building blocks of proteins.
- **Polynucleotides**: These are long chains of nucleotides, which are the building blocks of nucleic acids like DNA and RNA.

2. **Analyzing the Options**:
- **Option 1: Containing amino acids**:
- This is incorrect because only polypeptides contain amino acids. Polysaccharides and polynucleotides do not contain amino acids.

- **Option 2: Formed in condensation reaction**:
- This is correct. All three biomolecules are formed through condensation reactions, where water molecules are removed during the formation of glycosidic bonds (in polysaccharides), peptide bonds (in polypeptides), and phosphodiester bonds (in polynucleotides).

- **Option 3: Containing nitrogen**:
- This is incorrect. While polypeptides and polynucleotides contain nitrogen, polysaccharides may or may not contain nitrogen, so this option does not apply to all three.

- **Option 4: Acid-soluble pool**:
- This is incorrect. The acid-soluble pool refers specifically to small polysaccharides that can dissolve in acid, and it does not apply to polypeptides or polynucleotides.

3. **Conclusion**:
- The only option that applies to all three biomolecules (polysaccharides, polypeptides, and polynucleotides) is that they are all formed in condensation reactions.

### Final Answer:
Polysaccharides, polypeptides, and polynucleotides have in common that they are all formed in condensation reactions.

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