Question detail
What are the components of a DNA nucleotide?
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. A sugar, a phosphate group, and a nitrogenous base
- B. A sugar, an amino group, and a carboxylic acid
- C. A phosphate group, a carboxylic acid, and a nitrogenous base
- D. A sugar, a hydroxyl group, and a nitrogenous base
Answer
A sugar, a phosphate group, and a nitrogenous base
Explanation
A DNA nucleotide consists of three main components: a deoxyribose sugar, a phosphate group, and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine). This structure is essential for the formation of DNA.
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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