Question detail
Describe the significance of hydrogen bonds in the formation of complementary base pairs in DNA.
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At a glance
Question
Type
exam_style
Style
Topic
Amino acids, proteins and DNA (A-level only)
Question
Describe the significance of hydrogen bonds in the formation of complementary base pairs in DNA.
Answer
Hydrogen bonds are crucial for the formation of complementary base pairs in DNA, as they provide the necessary attraction between the bases. This interaction stabilizes the double helix structure, allowing for accurate replication and transcription of genetic information.
Explanation
This answer highlights the importance of hydrogen bonds in DNA structure, testing the student's comprehension of molecular interactions and their biological implications. It reinforces the concept of how weak interactions contribute to the stability of large biomolecules.
Common mistake
Misunderstanding Base Pairing
Students often confuse the specific hydrogen bonds formed between complementary bases in DNA, such as pairing adenine with thymine and cytosine with guanine.
To clarify, remember that adenine (A) forms two hydrogen bonds with thymine (T), while cytosine (C) forms three hydrogen bonds with guanine (G). This can be summarized as: A-T (2 H-bonds) and C-G (3 H-bonds). Therefore, when explaining complementary base pairing, ensure to specify the number of hydrogen bonds formed between each pair.
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