DNA Modeling: Molecular Structure & Replication
The two activities in this kit introduce students to the structure of the DNA molecule and how its structure allows it to replicate. Using a unique Lab-Aids modeling set, students first build an 8-rung DNA double helix and learn the base-pairing rule. Then starting with a 4-rung segment, they unzip the ladder and create two identical 4-rung strands by adding in new base pairs and sugar-phosphate groups.
Details at a Glance
- 2-3 Days | 2-3 ~50 minute class periods
- 2 Activities
- Accommodates unlimited classes, each with 16 groups of 2 students
- Meets our criteria for supporting literacy
- All materials are non-consumable
- Includes digital resources
Scientific Concepts
•DNA molecules have a “twisted ladder” double helix structure.
•Each “ladder rung” consists of a nitrogen base pair (single-ring pyrimidine linked to double-ring purine).
•The order of these base pair “rungs” determines the genetic code of every living thing.
•DNA molecules replicate by “zipping apart” where the weak hydrogen bonds connect the nitrogen bases.
•Models help scientists visualize and understand many concepts and processes.
Key Vocabulary: adenine, double helix, hydrogen bond, replication, cytosine, guanine, purine, thymine, DNA, hereditary, pyrimidine
Guides & Student Sheets
Our kits and modules provide you with everything you need so you can open, review, and teach the material confidently the next day.
- Full downloadable Teacher Guide with background information, detailed instruction, example data and answers
- Downloadable Student Sheets with age appropriate background information, full procedure(s), and analysis questions
- All materials necessary to carry out the investigation
- Safety Data Sheets
Kit Components
- 1 Deoxyribose-sugar group, pkg of 256
- 1 Phosphate group, pkg of 256
- 1 Hydrogen bond, pkg of 128
- 1 Adenine, pkg of 64
- 1 Guanine, pkg of 64
- 1 Cytosine, pkg of 64
- 1 Thymine, pkg of 64
- 1 Resealable bag,16
- 1 Label for resealable bag, 16
- 36 Student Worksheet and Guide
- 1 Teacher’s Guide
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