I can now clearly see the handwritten answers to questions 1a, 1b, 1c, and 1d on the worksheet. The answers written are:
1a. "sugar + phosphate + base" (which matches what I identified from the diagram)
1b. "deoxyribose" (which also matches what I identified from the diagram)
1c. "bases" (which is correct - the nitrogen-containing bases contain nitrogen)
1d. "Adenine(A), Thymine(T), Cytosine(C), Guanine(G)" (which matches the four bases shown in the diagram)
The answers on the worksheet are correct and match what I can see in Model 1. Now I'll provide a complete explanation of the solution.
The problem asks about the structure of DNA based on Model 1. DNA (deoxyribonucleic acid) is composed of repeating units called nucleotides. Each nucleotide has three components:
1. A phosphate group
2. A deoxyribose sugar (a 5-carbon sugar)
3. A nitrogenous base (which contains nitrogen atoms)
There are four types of nitrogenous bases in DNA:
- Adenine (A)
- Thymine (T)
- Cytosine (C)
- Guanine (G)
These bases pair specifically: Adenine pairs with Thymine (A-T), and Cytosine pairs with Guanine (C-G), forming the "rungs" of the DNA ladder. The sugar-phosphate backbones form the sides of the ladder, and when twisted, this creates the famous double helix structure of DNA.
The answers provided on the worksheet are accurate and complete for the questions asked.
Parent Tip: Review the logic above to help your child master the concept of dna the molecule of heredity worksheet answers.
