MDCAT Biology MCQ #825

A geneticist calculates the melting temperature of DNA. Which base pair contributes more to DNA stability due to having three hydrogen bonds?

MDCAT Biology MCQ #825

  1. Question 1

    Q1. A geneticist calculates the melting temperature of DNA. Which base pair contributes more to DNA stability due to having three hydrogen bonds?

    • A) Adenine and Thymine
    • B) Adenine and Uracil
    • C) Guanine and Adenine
    • D) Guanine and Cytosine

    Answer: Guanine and Cytosine

    Explanation: In DNA, Guanine always pairs with Cytosine via three hydrogen bonds. Adenine pairs with Thymine via only two hydrogen bonds.