This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Techniques in molecular biology, Subject name: Biochemistry
The term restriction map primarily refers to the mapping of sites of 
Select and explain. 
A. Action of bacteriophages, B. Cleavage of restriction enzymes, C. Mutational hotspot, D. DNA fingerprinting
B: Cleavage of restriction enzymes
Answer: B: Cleavage of restriction enzymes 
Explanation: Restriction map of DNA mapping of sites of cleavage of restriction enzymes on a DNA fragment. Identifies fragments of DNA that contain specific genes or sequences. Example of a restriction map of bacteriophage DNA