Which one of the following contains copper besides iron ?

Options

A. Cytochrome -f
B. Cytochrome oxidase
C. Platoquinone
D. Cyochrome - `c_(1)`

Answer

To solve the question "Which one of the following contains copper besides iron?", we can follow these steps:

### Step 1: Understand the Question
The question is asking for a specific protein or complex that contains both copper and iron.

### Step 2: Identify Relevant Proteins
We need to think about proteins or complexes in biological systems that are known to contain both of these metals.

### Step 3: Recall Information about Cytochrome Oxidase
One well-known protein that fits this description is cytochrome oxidase. This is a complex involved in cellular respiration.

### Step 4: Analyze the Components of Cytochrome Oxidase
Cytochrome oxidase is a transmembrane protein found in the mitochondria of eukaryotic cells and in some bacteria. It is composed of:
- Two heme groups (which contain iron)
- Two copper centers

### Step 5: Confirm the Presence of Both Metals
Since cytochrome oxidase contains both iron (from the heme groups) and copper (from the copper centers), it meets the criteria set by the question.

### Step 6: Provide the Answer
Thus, the correct answer to the question is that cytochrome oxidase contains both copper and iron.

### Final Answer
The correct option is B: Cytochrome oxidase.

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