Original Project
Reproduction, Genes, and Heredity
Genetic information is encoded in DNA molecules.
Item RH002002: Four different types of nucleotides are used to make DNA molecules, not one, two, or twenty.
DNA molecules are made up of subunits called nucleotides that are linked together. How many different types of nucleotides are used to make DNA molecules?
- One type
- Two types
- Four types
- Twenty types
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 648 | 1432 | 45% |
| Grades | |||
| 6–8 | 369 | 973 | 38% |
| 9–12 | 279 | 459 | 61% |
| Gender | |||
| Male | 281 | 677 | 42% |
| Female | 356 | 731 | 49% |
| Primary Language | |||
| English | 570 | 1239 | 46% |
| Other | 67 | 155 | 43% |