Problem Overview:
The task involves identifying and labeling the structural differences between RNA and DNA. The worksheet provides diagrams of RNA (left) and DNA (right), along with chemical structures of nucleobases. The goal is to fill in the blanks using words from the provided word bank and color the molecule models appropriately.
Key Concepts:
1.
DNA (Deoxyribonucleic Acid):
- Double-stranded helix.
- Sugar: Deoxyribose.
- Nucleobases: Adenine (A), Thymine (T), Guanine (G), Cytosine (C).
- Base pairing: A-T, G-C.
2.
RNA (Ribonucleic Acid):
- Single-stranded helix.
- Sugar: Ribose.
- Nucleobases: Adenine (A), Uracil (U), Guanine (G), Cytosine (C).
- Base pairing: A-U, G-C (in RNA-RNA interactions).
3.
Structural Differences:
- DNA has a double helix, while RNA is typically single-stranded.
- DNA contains thymine (T), while RNA contains uracil (U).
- DNA uses deoxyribose sugar, while RNA uses ribose sugar.
Solution:
#### Step 1: Label the Diagrams
-
Left Diagram (RNA):
- This is a single-stranded helix.
- The sugar-phosphate backbone is on the outside.
- The nucleobases are on the inside.
-
Right Diagram (DNA):
- This is a double-stranded helix.
- Two sugar-phosphate backbones run parallel to each other.
- The nucleobases form base pairs in the center.
#### Step 2: Identify Nucleobases
-
Left Column (RNA Nucleobases):
- Top: Adenine (A)
- Second: Guanine (G)
- Third: Cytosine (C)
- Bottom: Uracil (U)
-
Right Column (DNA Nucleobases):
- Top: Adenine (A)
- Second: Guanine (G)
- Third: Cytosine (C)
- Bottom: Thymine (T)
#### Step 3: Fill in the Blanks
Using the word bank, fill in the blanks based on the structures and their components:
1.
Left Diagram (RNA):
- Blank 1: "helix of sugar-phosphates" (single-stranded RNA has a helical structure made of sugar-phosphate backbones).
- Blank 2: "Nucleobases of RNA" (the bases shown are specific to RNA: A, G, C, U).
2.
Right Diagram (DNA):
- Blank 1: "helix of sugar-phosphates" (double-stranded DNA has two sugar-phosphate backbones forming a helix).
- Blank 2: "Base pair" (DNA forms base pairs between complementary nucleobases: A-T, G-C).
- Blank 3: "Nucleobases of DNA" (the bases shown are specific to DNA: A, G, C, T).
#### Step 4: Color the Molecule Models
- Use different colors to distinguish:
- Sugar-phosphate backbones (e.g., blue).
- Nucleobases (e.g., red for adenine, green for guanine, yellow for cytosine, purple for thymine/uracil).
- Hydrogen bonds (e.g., orange).
Final Answer:
-
Left Diagram (RNA):
- Blank 1:
helix of sugar-phosphates
- Blank 2:
Nucleobases of RNA
-
Right Diagram (DNA):
- Blank 1:
helix of sugar-phosphates
- Blank 2:
Base pair
- Blank 3:
Nucleobases of DNA
\boxed{\text{helix of sugar-phosphates, Nucleobases of RNA, helix of sugar-phosphates, Base pair, Nucleobases of DNA}}
Parent Tip: Review the logic above to help your child master the concept of nucleic acid worksheet.
