Humber Admissions Practice Test 2025 - Free Practice Questions and Study Guide for Humber College Admissions

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Which nitrogen base pairs with Guanine in DNA?

Adenine

Cytosine

In DNA, Guanine pairs specifically with Cytosine through hydrogen bonds. This pairing is part of the base pairing rules established by Watson and Crick, which are foundational to understanding the structure of DNA. The complementary nature of these bases ensures that the genetic information is accurately replicated during cell division.

Guanine, being a purine, pairs with Cytosine, which is a pyrimidine, creating a stable structure that supports the double helix formation of DNA. The specific pairing is crucial for maintaining the integrity of the genetic code.

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Uracil

Thymine

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