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The hydrogen bonds are found in be tween...

The hydrogen bonds are found in be tween the

A

nitrogenous bases

B

sugar molecules

C

phosphoric acid

D

sugar and phosphoric acid

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The correct Answer is:
To answer the question "The hydrogen bonds are found in between the", we need to analyze the options provided and understand the context of hydrogen bonds in the structure of DNA. ### Step-by-Step Solution: 1. **Understanding Hydrogen Bonds**: - Hydrogen bonds are weak attractions that occur between a hydrogen atom covalently bonded to an electronegative atom (like nitrogen or oxygen) and another electronegative atom. In the context of DNA, these bonds play a crucial role in stabilizing the double helix structure. 2. **Identifying the Components of DNA**: - DNA is composed of three main components: - Nitrogenous bases (adenine, thymine, cytosine, guanine) - Sugar (deoxyribose) - Phosphate group (phosphoric acid) 3. **Analyzing the Options**: - **Option A: Nitrogenous base**: This option is relevant because hydrogen bonds form between nitrogenous bases of opposite strands in DNA (e.g., adenine pairs with thymine, and cytosine pairs with guanine). - **Option B: Sugar molecule**: This is incorrect as hydrogen bonds do not form between sugar molecules. - **Option C: Phosphoric acid**: This is also incorrect since hydrogen bonds do not occur between phosphoric acid groups. - **Option D: Sugar and phosphoric acid**: This is incorrect as well; the bond between sugar and phosphoric acid is a phosphodiester bond, not a hydrogen bond. 4. **Conclusion**: - The correct answer is **Option A: Nitrogenous base**. Hydrogen bonds are found between the nitrogenous bases of the DNA strands. ### Final Answer: The hydrogen bonds are found in between the **nitrogenous bases**. ---
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