Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Sum up for me what the words below are saying in one sentence. 

What Is the Difference Between a Nonet and an Etheree?
The nonet is similar to the etheree poetry form, which consists of ten lines. In the etheree, each line’s syllable count increases as it goes along. The first line contains one syllable, the second line contains two, and so on until the final line.
Response: Nonet and Etheree poems are similar, with the latter starting with one syllable and adding another with each line until it stops on the tenth. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Summarize the main function of the mitochondria in a cell.
user
Mitochondria are the powerhouse of the cell, generating most of the cell's supply of adenosine triphosphate (ATP) through cellular respiration.
assistant