Question

What does a genomic DNA library represent?

• A. Only expressed genes
• B. Only protein-coding sequences
• C. The entire genome of an organism
• D. Only mRNA sequences

Hint:

Comparison of DNA libraries: \[ \boxed{ \begin{aligned} \text{Genomic library} &\rightarrow \text{Entire genome} \text{cDNA library} &\rightarrow \text{Only expressed genes} \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Recall the definition of a genomic library. A genomic DNA library is prepared from the total genomic DNA of an organism. It includes \[ \boxed{ \text{coding sequences, introns, promoters and intergenic regions.} } \]

Step 2: Identify the correct option. Thus, a genomic library represents \[ \boxed{\text{the entire genome of an organism}.} \] Therefore, \[ \boxed{(C)} \] is the correct answer.