DNA structure and base pairing: the double helix, nucleotides, and A–T and C–G pairs, with complementary strand practice. There are 4 sheets here: vocabulary match, fill in the blanks, true or false and complementary strands. Pick one from the tray, print it, and add its answer key as a second page if you want one.
Worksheets
NameDate
DNA vocabulary
Write the letter of the matching meaning next to each word.
WordMeaning
nucleotide
double helix
chromosome
base pair
adenine
cytosine
DNA
gene
Apairs with guanine
Bsugar, phosphate and a base
Ca section of DNA for one trait
Dpairs with thymine
Emolecule that carries genetic instructions
Ftwisted-ladder shape of DNA
Gtwo bases joined across the ladder
Htightly coiled DNA
Using these sheets
New problems gives the same kind of sheet with different numbers, so you can print one for class and another for homework.
The answer key matches the sheet on screen, including after you make new problems.
Sheets print on US Letter paper. On A4, choose “Fit to printable area” in the print dialog.
Questions
What grade are these DNA worksheets for?
They suit grades 7 to 10. Each sheet in the tray practices it a different way, so you can pick the one that fits.
Is there an answer key?
Yes. Tick “add the answer key as page 2” before printing, or turn on Answer key to check work on screen.
Can I print more than one version?
Yes. Press New problems for a fresh set of the same kind, then print again. The answer key changes with it.
Do I need an account to print?
No. The sheets print straight from this page, free, with no sign-up.