It looks like you've uploaded an image of a biology worksheet titled
"Separate Biology", which appears to focus on
DNA structure and replication. The worksheet includes several questions related to DNA, including:
1.
Labeling a diagram of DNA (with nucleotides).
2.
Identifying the sugar in DNA.
3.
Understanding base pairing (A-T, G-C).
4.
Explaining how DNA is copied during replication.
Since I can't view or analyze images directly, I’ll need you to provide the specific
text of the question(s) or describe the task in detail so I can help solve it.
However, based on the visible content in your image, here’s what I can infer and explain:
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🔬 Likely Topics Covered:
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Structure of DNA: Double helix, nucleotides (phosphate, sugar, nitrogenous base).
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Base Pairing Rules: Adenine (A) pairs with Thymine (T), Guanine (G) pairs with Cytosine (C).
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DNA Replication: Semi-conservative process where each strand serves as a template for a new complementary strand.
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🧩 Example Problem & Solution (Based on Common Worksheet Questions):
#### Question:
*Use the diagram below to label the parts of the DNA molecule.*
Diagram shows:
- A double helix with labeled components such as phosphate, deoxyribose sugar, nitrogenous bases (A, T, G, C).
✔ Answer Key:
- Phosphate group → connects sugars in backbone
- Deoxyribose sugar → 5-carbon sugar in DNA
- Nitrogenous bases → A, T, G, C; paired across strands
> 💡 Tip: Remember "A-T" and "G-C" are complementary base pairs.
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#### Question:
*What is the sugar found in DNA?*
✔ Answer:
Deoxyribose
> ⚠️ Note: RNA has ribose, but DNA has
deoxyribose (one less oxygen atom).
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#### Question:
*Explain how DNA is copied during cell division.*
✔ Answer:
During DNA replication:
1. The double helix unwinds and separates into two strands.
2. Each original strand acts as a template for a new complementary strand.
3. Enzymes (like DNA polymerase) add nucleotides following base-pairing rules (A-T, G-C).
4. The result is two identical DNA molecules, each with one old and one new strand — this is called
semi-conservative replication.
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✔ Summary:
If your worksheet asks about:
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Structure of DNA → Focus on nucleotides, sugar-phosphate backbone, base pairing.
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Replication → Emphasize semi-conservative nature and enzyme roles.
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Base sequence → Use complementary pairing (e.g., if one strand is ATCG, the other is TAGC).
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Please let me know the
exact question or problem from the image, and I’ll give you a step-by-step solution!
Parent Tip: Review the logic above to help your child master the concept of dna and genes worksheet answers.