How many hydrogen bonds form between adenine and thymine in DNA?

Prepare for the Molecular Genetics Exam with comprehensive resources. Use flashcards and detailed multiple-choice questions featuring explanations. Begin your learning journey and succeed!

Multiple Choice

How many hydrogen bonds form between adenine and thymine in DNA?

Explanation:
Adenine and thymine pair in DNA through two hydrogen bonds. This two-bond interaction is the classic Watson-Crick base pairing, where the hydrogen-bonding sites on A and T align to form two bonds. This arrangement keeps the DNA double helix uniform in width and provides enough stability to hold the strands together while still allowing them to separate during replication and transcription. In contrast, guanine and cytosine form three hydrogen bonds, giving GC-rich regions extra stability. So, the number of hydrogen bonds between adenine and thymine is two.

Adenine and thymine pair in DNA through two hydrogen bonds. This two-bond interaction is the classic Watson-Crick base pairing, where the hydrogen-bonding sites on A and T align to form two bonds. This arrangement keeps the DNA double helix uniform in width and provides enough stability to hold the strands together while still allowing them to separate during replication and transcription. In contrast, guanine and cytosine form three hydrogen bonds, giving GC-rich regions extra stability. So, the number of hydrogen bonds between adenine and thymine is two.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy