This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Restriction endonuclease function is true about - 
Select and explain. 
A. Cut both the strands of dsDNA, B. The cut ends produced are sticky, C. The cut ends produced are blunt, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Restriction endonuclease cuts both strands of DNA.
Cut ends may be blunt (in linear cut) or sticky (in staggered cut).