DNA worksheets
Complementary strands, reverse complements, GC content, and DNA vocabulary practice.
What these worksheets teach
These worksheets train Watson–Crick pairing, reverse-complement operations, base composition, and DNA vocabulary so students can manipulate short sequences without guessing.
Appropriate learners
Audience selectors include middle school, high school, AP Biology, and intro college. These labels guide difficulty and wording only — Chromatin.net does not claim verified accreditation or standards alignment.
Skills practiced
- Write complementary strands 5′→3′
- Distinguish reverse vs complement vs reverse complement
- Calculate GC%
- Use precise DNA structure vocabulary
- DNA complementary strand — Write the complementary DNA strand for given 5′→3′ sequences.
- DNA reverse complement — Compute reverse, complement, and reverse-complement products.
- GC-content calculations — Count bases and calculate GC% for DNA sequences.
- DNA vocabulary — Match and define DNA structure and function terms.
How to use
- Choose a worksheet type, question count, level, and audience.
- Optionally set a seed to reproduce the same set later.
- Download the worksheet PDF and answer-key PDF, or open the print view.
- Generated links are private (
noindex) and expire after cleanup. Permanent category pages like this one remain indexable.
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Example questions
- Given DNA 5′→3′ ATGC…, write the complementary strand 5′→3′.
- For sequence X, report A/T/G/C counts and GC%.
- Define nucleobase vs nucleotide in one precise sentence.
Teacher suggestions
- Start with complementary-strand drills before reverse-complement language.
- Require students to write 5′ and 3′ on every answer line.
- Pair with the DNA structure learning topic after the first set.
- Assign the worksheet PDF first; release the answer key after class work.
- Reuse a seed across periods for the same assessment version.
Related lesson links
- DNA — DNA stores genetic information as a sequence of nucleotide bases in a double helix.
- DNA structure — DNA structure features a sugar-phosphate backbone and complementary base pairs forming a double helix.
- DNA base pairing — DNA base pairing pairs A with T and G with C, enabling complementary strands and accurate copying.