Final answer:
Lung cancer is primarily caused by mutations in the DNA of abnormal cells, which can result from both spontaneous errors during DNA replication and exposure to carcinogens found in tobacco smoke.
Step-by-step explanation:
Lung cancer, which can develop as a result of smoking, is primarily caused by mutations in the DNA of abnormal cells. These mutations can be the result of both spontaneous errors during DNA replication and exposure to carcinogens found in tobacco smoke. Carcinogens are agents that can cause cancer, and in the case of lung cancer, tobacco smoke acts as a major carcinogen. The chemicals in tobacco smoke can directly damage DNA and lead to mutations that contribute to the development of lung cancer. Lung cancer, which can develop as a result of smoking, is primarily caused by mutations in the DNA of abnormal cells.
These mutations can be the result of both spontaneous errors during DNA replication and exposure to carcinogens found in tobacco smoke. Carcinogens are agents that can cause cancer, and in the case of lung cancer, tobacco smoke acts as a major carcinogen. The chemicals in tobacco smoke can directly damage DNA and lead to mutations that contribute to the development of lung cancer.