Question detail
Which nitrogenous base pairs with adenine 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. Cytosine
- B. Thymine
- C. Guanine
- D. Uracil
Answer
Thymine
Explanation
In DNA, adenine pairs with thymine through hydrogen bonds, forming a complementary base pair that is essential for the stability of the DNA double helix.
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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