Onco- means which?

Onco- means which?

• A. Nail, claw
• B. Gate
• C. Scale
• D. Tumor

Answer: (D)

The main idea is recognizing common medical combining forms: onco- means tumor or mass. This prefix shows up in terms like oncology (the study of tumors), oncologist (doctor who treats cancer), and oncogene (a gene that can cause tumor formation). That link to tumors is why onco- is the correct meaning here. The other roots point to different things—nail or claw uses onych-; there isn’t a standard medical prefix from these options that means gate or scale in this context—so they don’t fit the concept of tumor.

The main idea is recognizing common medical combining forms: onco- means tumor or mass. This prefix shows up in terms like oncology (the study of tumors), oncologist (doctor who treats cancer), and oncogene (a gene that can cause tumor formation). That link to tumors is why onco- is the correct meaning here.

The other roots point to different things—nail or claw uses onych-; there isn’t a standard medical prefix from these options that means gate or scale in this context—so they don’t fit the concept of tumor.