Question detail
What role does the phosphate group play in DNA 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. It provides energy for DNA replication
- B. It forms the sugar-phosphate backbone
- C. It pairs with nitrogenous bases
- D. It stabilizes the double helix structure
Answer
It forms the sugar-phosphate backbone
Explanation
The phosphate group links with the deoxyribose sugar of adjacent nucleotides, forming the sugar-phosphate backbone that provides structural support to the DNA molecule.
Common mistake
Confusing DNA Nucleotide Components
Students often confuse the components of DNA nucleotides, such as mixing up the sugar and phosphate groups.
Remember that a DNA nucleotide consists of a deoxyribose sugar, a phosphate group, and a nitrogenous base. Clearly label each component when drawing or describing nucleotides.
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