Question detail
What is the result of the condensation reaction between two nucleotides?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Amino acids, proteins and DNA (A-level only)
Question
- A. Formation of a peptide bond
- B. Release of water and formation of a phosphodiester bond
- C. Formation of hydrogen bonds
- D. Release of carbon dioxide
Answer
Release of water and formation of a phosphodiester bond
Explanation
The condensation reaction between two nucleotides results in the release of a water molecule and the formation of a phosphodiester bond, linking the nucleotides together.
Common mistake
Confusing the Backbone Components
Students often confuse the components of the sugar-phosphate backbone in DNA, thinking that the sugar and phosphate groups are interchangeable.
To clarify, remember that the sugar (deoxyribose) and phosphate groups are distinct components. The sugar is linked to the phosphate group through a condensation reaction, forming a covalent bond. This can be summarized as: sugar + phosphate → sugar-phosphate backbone. Ensure you can identify each component and their roles in the structure.
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