DNA and Genes worksheet with a labeled diagram of the DNA double helix and fill-in-the-blank questions.

Problem Analysis:

The task involves labeling parts of a DNA molecule and completing statements about DNA structure and function. The image provided shows a double helix structure with labeled parts (1, 2, 3, 4). The goal is to identify these parts and answer questions related to DNA.

---

Step-by-Step Solution:

#### Part 1: Labeling the DNA Molecule
The DNA molecule in the image is a double helix, composed of two strands held together by hydrogen bonds between nitrogenous bases. Let's identify each labeled part:

1. Phosphate Group: This is part of the backbone of the DNA strand. It is negatively charged and helps stabilize the structure.
- Label 1: Phosphate group

2. Deoxyribose Sugar: This is a five-carbon sugar that forms the backbone of DNA along with the phosphate groups.
- Label 2: Deoxyribose sugar

3. Nitrogenous Base: These are the building blocks of DNA that form the genetic code. They pair up through hydrogen bonds (A-T and C-G).
- Label 3: Nitrogenous base

4. Hydrogen Bond: These bonds hold the two strands of DNA together by connecting complementary nitrogenous bases.
- Label 4: Hydrogen bond

So, the labels are:
- 1: Phosphate group
- 2: Deoxyribose sugar
- 3: Nitrogenous base
- 4: Hydrogen bond

---

#### Part 2: Completing the Statements

1. The sequence of _______ carries the genetic information of an organism.
- The genetic information in DNA is encoded in the sequence of nitrogenous bases (adenine, thymine, cytosine, and guanine). These bases pair up in a specific way (A-T and C-G) and their order determines the genetic code.
- Answer: Nitrogenous bases

2. The presence of _______ produces a copy of an organism’s genetic information.
- DNA replication is the process by which DNA makes an exact copy of itself. This occurs during cell division and ensures that each new cell receives a complete set of genetic instructions.
- Answer: DNA polymerase (or "DNA replication")

3. The ability to copy DNA is called _______.
- The process by which DNA makes an exact copy of itself is called replication.
- Answer: Replication

---

Final Answers:

1. Labels:
- 1: Phosphate group
- 2: Deoxyribose sugar
- 3: Nitrogenous base
- 4: Hydrogen bond

2. Statements:
- 96. Nitrogenous bases
- 97. DNA polymerase (or "DNA replication")
- 98. Replication

---

Boxed Final Answer:

\[
\boxed{
\text{1. Phosphate group, 2. Deoxyribose sugar, 3. Nitrogenous base, 4. Hydrogen bond; 96. Nitrogenous bases, 97. DNA polymerase (or "DNA replication"), 98. Replication}
}
\]