Question detail
Which groups are involved in the formation of the sugar-phosphate backbone in DNA?
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. Amine and carboxylic acid groups
- B. Phosphate and hydroxyl groups
- C. Sugar and phosphate groups
- D. Amino and hydroxyl groups
Answer
Sugar and phosphate groups
Explanation
The sugar-phosphate backbone of DNA is formed by the linkage of sugar and phosphate groups through condensation reactions.
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.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.