What category of molecules is represented by the mnemonic 'CUT'?

• A. Proteins
• B. Pyrimidines
• C. Purines
• D. Amino acids

Answer: (B)

The mnemonic 'CUT' specifically refers to the category of pyrimidines in nucleic acid structure. Pyrimidines are one of the two classes of nitrogenous bases found in nucleotides, the building blocks of DNA and RNA. 'C' stands for cytosine, 'U' stands for uracil, and 'T' stands for thymine.

This mnemonic helps learners remember that these three bases fall into the pyrimidine category, distinguishing them from purines, which include adenine and guanine. Understanding this distinction is crucial for grasping the basics of molecular biology, particularly in the context of DNA and RNA synthesis and function. Knowing the structural differences and functions of pyrimidines versus purines can aid in comprehending the overall framework of genetic material.