...................... are to proteins as -. are to nucleic acids :

Options

A. sugars, lipids
B. amino acids, hydrogen bonds
C. sugars, proteins
D. amino acids, nucleotides

Explanation

To solve the question, we need to identify the relationship between the components of proteins and nucleic acids. The question asks us to fill in the blanks for the analogy: "...................... are to proteins as ........ are to nucleic acids."

### Step-by-Step Solution:

1. **Identify the Monomers of Proteins**:
- Proteins are made up of smaller units called **amino acids**. Therefore, the monomer of proteins is **amino acids**.

2. **Identify the Monomers of Nucleic Acids**:
- Nucleic acids, such as DNA and RNA, are composed of smaller units called **nucleotides**. Thus, the monomer of nucleic acids is **nucleotides**.

3. **Construct the Analogy**:
- Now we can fill in the analogy: "Amino acids are to proteins as nucleotides are to nucleic acids."
- Therefore, the correct answer is: **Amino acids are to proteins as nucleotides are to nucleic acids.**

### Final Answer:
**Amino acids are to proteins as nucleotides are to nucleic acids.**

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