Solved DNA Worksheet Mr: Hoyle - Replicate DNA Objectives ... - Free Printable

Let’s go step by step to fill in all the blanks on this DNA worksheet. I’ll answer each question clearly and simply, just like we’re working through it together.

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Structure of Nucleic Acids

1. The building blocks of nucleic acids are known as nucleotides.
→ Think of them like LEGO bricks — they snap together to build DNA.

2. Draw and label the three parts of a nucleotide.
→ You should draw:
- A circle labeled “Phosphate group”
- A pentagon (5-sided shape) labeled “Sugar (deoxyribose)”
- A rectangle or irregular shape attached to the sugar, labeled “Nitrogenous base” (like A, T, C, or G)
→ These three parts connect: phosphate connects to sugar, sugar connects to base.

3. Diagram and label the two types of nitrogenous bases.
→ Split your box into two sides:
Left side: Label “Purines” → Draw adenine (A) and guanine (G). They have double-ring structures.
Right side: Label “Pyrimidines” → Draw cytosine (C), thymine (T). They have single-ring structures.
→ Tip: Purines = bigger (double ring), Pyrimidines = smaller (single ring).

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Function of DNA

1. The acronym DNA stands for Deoxyribonucleic Acid.
→ It’s the full name — kind of like how “TV” stands for “television.”

2. DNA makes up chromosomes, which are located in the nucleus of a cell.
→ The nucleus is like the control center of the cell — that’s where DNA lives.

3. Small sections of a DNA molecule that determine genetic traits are called genes.
→ Genes are like instructions — one gene might tell your body to make brown eyes, another for curly hair.

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Structure of DNA

1. The sugar found in DNA is deoxyribose.
→ That’s why it’s called *deoxy*ribonucleic acid — because of this special sugar.

2. The pyrimidine bases are cytosine and thymine.
→ Remember: Pyrimidines = C and T (single rings).

3. The purine bases are adenine and guanine.
→ Purines = A and G (double rings).

4. In complimentary base pairing, adenine bonds with thymine and cytosine bonds with guanine.
→ A always pairs with T, C always pairs with G — like best friends who only hang out together.

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Diagram of DNA molecule

1. A DNA molecule consists of two strands.
→ It’s a double helix — two twisted ladders stuck together.

2. DNA is a long chain made of repeating units called nucleotides.
→ Same as the building blocks from earlier — they repeat over and over.

3. Nucleotides are attached by bonds between the sugar and the phosphate group.
→ The backbone of DNA is sugar-phosphate-sugar-phosphate… like beads on a string.

4. DNA is shaped like a double helix.
→ Imagine a spiral staircase — that’s what DNA looks like when you zoom in!

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Final Answer:

Structure of Nucleic Acids
1. nucleotides
2. [Draw: Phosphate group, Sugar (deoxyribose), Nitrogenous base]
3. [Left: Purines – Adenine, Guanine; Right: Pyrimidines – Cytosine, Thymine]

Function of DNA
1. Deoxyribonucleic Acid
2. nucleus
3. genes

Structure of DNA
1. deoxyribose
2. cytosine, thymine
3. adenine, guanine
4. adenine, thymine, cytosine, guanine

Diagram of DNA molecule
1. two
2. nucleotides
3. sugar
4. double