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
Molecular scissors refers to: 
Select and explain. 
A. DNA Polymerase, B. Restriction Endonuclease, C. Primase, D. Helicase
B: Restriction Endonuclease
Answer: B: Restriction Endonuclease 
Explanation: Molecular scissors refers to Restriction Endonuclease. Molecular scissors/Restriction Endonuclease Cut at random sites or Pallindromic sites (same sequence on opposite strands). Create sticky or blunt ends.