Restriction enzymes, often referred to as “molecular scissors,” are classified into: ((MCAER 2014))

✅Explanation: The Mohs scale is a geological scale used to measure the hardness of minerals. It ranges from 1 (softest) to 10 (hardest), with talc being the softest and diamond being the hardest.  

📌 Other Options Explanations:
-Option B: The Richter scale is used to measure the magnitude of earthquakes.
-Option C: The Beaufort scale is used to measure wind speed.
-Option D: The Kelvin scale is a temperature scale used in scientific measurements.

🔑Key Points:
-It is the ability of the material to resist scratch.
-It is measured by Mohs hardness test in which the mineral substances of known variation in hardness are used to scratch the rock.