Which base pairs with cytosine in DNA?

Alberta Grade 9 Science Test: Master your knowledge with our comprehensive practice resources. Featuring engaging flashcards and detailed multiple-choice questions with explanations, get ready to succeed!

Multiple Choice

Which base pairs with cytosine in DNA?

Explanation:
Cytosine pairs with guanine in DNA because they form complementary base pairs stabilized by hydrogen bonds. In DNA, cytosine makes three hydrogen bonds with guanine, which helps hold the two strands together and keeps the DNA’s width uniform. This pairing is specific and reliable due to the shapes and bonding capabilities of the bases. Other bases pair differently in DNA: adenine pairs with thymine, and while RNA uses uracil in place of thymine and pairs with adenine, cytosine does not pair with those bases. So the base that pairs with cytosine is guanine.

Cytosine pairs with guanine in DNA because they form complementary base pairs stabilized by hydrogen bonds. In DNA, cytosine makes three hydrogen bonds with guanine, which helps hold the two strands together and keeps the DNA’s width uniform. This pairing is specific and reliable due to the shapes and bonding capabilities of the bases. Other bases pair differently in DNA: adenine pairs with thymine, and while RNA uses uracil in place of thymine and pairs with adenine, cytosine does not pair with those bases. So the base that pairs with cytosine is guanine.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy