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On which concentration of Mg(+2) ions di...

On which concentration of `Mg(+2)` ions dimer of ribosome is formed :–

A

0.0001 M

B

0.001 M

C

0.01 M

D

0.10 M

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Ribosome Structure**: Ribosomes are made up of two subunits, the large subunit and the small subunit. These subunits come together to form a functional ribosome during protein synthesis. 2. **Role of Magnesium Ions**: Magnesium ions (Mg²⁺) play a crucial role in stabilizing the interaction between the ribosomal subunits. They act as a bridge that helps to hold the two subunits together. 3. **Comparing Ions**: Other ions, such as potassium (K⁺), do not stabilize the ribosomal dimer. Instead, they can disrupt the binding of the ribosomal units because they compete with magnesium ions for binding sites. 4. **Concentration of Mg²⁺ Ions**: The concentration of magnesium ions is critical for the formation of the ribosomal dimer. A specific concentration is required to ensure that the magnesium ions can effectively stabilize the ribosomal units. 5. **Determining the Required Concentration**: According to the information provided, the concentration of magnesium chloride (MgCl₂) required for the stable formation of the ribosome dimer is 0.001 mol. At this concentration, the magnesium ions can effectively facilitate the dimerization of ribosomal subunits. 6. **Conclusion**: Therefore, the concentration of Mg²⁺ ions at which the dimer of ribosome is formed is 0.001 mol.
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