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When a phosphate group is linked to '5' ...

When a phosphate group is linked to '5' OH of deoxyadenosine by phosphodiester linkage , a corresponding nucleotide is formed, which is

A

Adenosine

B

Adenylic acid

C

Adenine

D

Deoxyadenylic acid

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to understand the components involved when a phosphate group is linked to the 5' OH of deoxyadenosine through a phosphodiester linkage. Let's break down the solution step by step: ### Step-by-Step Solution: 1. **Identify the Components**: - Deoxyadenosine is a nucleoside that consists of a nitrogenous base (adenine) and a sugar (deoxyribose). - A phosphate group is a chemical group consisting of a phosphorus atom bonded to four oxygen atoms. 2. **Understand Phosphodiester Linkage**: - A phosphodiester linkage occurs when a phosphate group is attached to the 5' hydroxyl (OH) group of a sugar molecule in nucleotides. This linkage is crucial in forming the backbone of nucleic acids (DNA and RNA). 3. **Determine the Resulting Structure**: - When a phosphate group is added to the 5' OH of deoxyadenosine, it forms a nucleotide. The resulting structure will include: - The deoxyribose sugar (from deoxyadenosine) - The nitrogenous base (adenine) - The phosphate group 4. **Identify the Correct Nucleotide**: - The nucleotide formed by adding a phosphate group to deoxyadenosine is known as deoxyadenylic acid (or dAMP). This is because it contains: - A deoxyribose sugar - The adenine base - One phosphate group linked to the 5' position. 5. **Choose the Correct Answer**: - Among the options provided: - Adenosine: A nucleoside (not a nucleotide). - Adenylic acid: A nucleotide with ribose sugar (not deoxyribose). - Adenine: A nitrogenous base (not a nucleotide). - **Deoxyadenylic acid**: This is the correct answer as it includes the deoxyribose sugar, adenine base, and phosphate group. ### Final Answer: The corresponding nucleotide formed when a phosphate group is linked to the 5' OH of deoxyadenosine by phosphodiester linkage is **deoxyadenylic acid**. ---
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