DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing


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question 1 of 3

Which of the following bases are categorized as purines?

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1. Which of the following statements is true?

2. Why do DNA strands need to be antiparallel?

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About This Quiz & Worksheet

Your understanding of the chemicals that make up DNA will be assessed through this quiz and accompanying worksheet. Practice questions review purines, the antiparallel nature of DNA, and the types of bonds that hold DNA strands together.

Quiz & Worksheet Goals

This quiz will test your understanding of the chemical structure of DNA, including your ability to identify:

  • Which bases are purines
  • The four nitrogenous bases
  • A good description of DNA's antiparallel nature
  • Correct information about DNA molecular bonds

Skills Practiced

This assessment will measure the following skills:

  • Defining key concepts - ensure that you can accurately define main phrases, such as antiparallel, purine, and nitrogenous base
  • Interpreting information - verify that you can read information about the bonds in DNA
  • Information recall - access the knowledge you've gained regarding the four nitrogenous bases in DNA

Additional Learning

DNA is a complex molecule that contains the genetic code. Your understanding of this molecule can be enhanced by reviewing the lesson called DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing. Topics include:

  • A review of nucleic acids
  • The chemical structure of DNA, including the four base nitrogenous bases
  • Pyrimidines vs. purines
  • Complementary base pairings
  • Antiparallel nature of DNA strands