Genomic DNA library means

Options

A. A collection of literature about DNA
B. A collection of organisms for extracting DNA
C. A collection of total genomic DNA of a single organism
D. A collection of gene vectors

Answer

### Step-by-Step Solution:

1. **Understanding the Concept of a Genomic DNA Library**:
- A genomic DNA library is a collection of DNA fragments that represent the entire genome of a specific organism. It is created by isolating the genomic DNA from that organism and then inserting it into vectors for storage and manipulation.

2. **Identifying the Purpose of a Genomic DNA Library**:
- The primary purpose of a genomic DNA library is to study the complete sequence of DNA from an organism. This allows researchers to access and analyze the genetic information contained within the genome.

3. **Creation of a Genomic DNA Library**:
- To create a genomic DNA library, genomic DNA is first isolated from the organism using techniques such as restriction enzyme digestion. This DNA is then inserted into vectors (like plasmids or cosmids) that can carry large amounts of DNA.

4. **Storage and Multiplication**:
- Once the DNA is inserted into vectors, these vectors are introduced into host cells (such as bacteria). The host cells multiply, creating many copies of the inserted DNA, which can be retrieved and studied when needed.

5. **Correct Option Identification**:
- Given the options:
- A collection of literature about DNA (incorrect)
- A collection of organisms for extracting DNA (incorrect)
- A collection of total genomic DNA of a single organism (correct)
- A collection of gene vectors (incorrect)
- The correct answer is: **A collection of total genomic DNA of a single organism**.