Pertanyaan

Therefore cancer develops if the immune system is not working properly or the amount of cells produced is too great for the immune system to eliminate.

What is cancer? It is actually a group of more than one hundred separate diseases. Most of us are fear from cancer. It is reasonable because next to heart disease, cancer is the second leading cause of death.

Cancer cells come from normal cells because of mutations of DNA. Those mutations can occur spontaneously. The mutations may be also induced by other factors such as: nuclear and electromagnetic radiation, viruses, bacteria and fungi, parasites, heat, chemicals in the air, water and food, mechanical cell-level injury, free radicals, evolution and ageing of DNA, etc. All such factors can produce mutations that may start cancer.

Cancer cells are formed continuously in the organism. It is estimated that there are about 10,000 cancer cells at any given time in a healthy person. Why do some result in macroscopic-level cancers and some do not? First, not all damaged cells can multiply and many of them die quickly. Second, those which potentially divide and form cancer are effectively destroyed by the mechanisms available to the immune system

Therefore cancer develops if the immune system is not working properly or the amount of cells produced is too great for the immune system to eliminate.

From the text above we can make conclusion that ...

Cancer cells come from unhealthy cells
Only nine causes of cancer stated in the text
The immune system gives no effect to cancer
More than 10,000 cells exists in human's body
Heart disease and cancer are the 1st cause of death

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jawaban yang tepat adalah A.

Pembahasan

Dari kelima pilihan jawaban, pernyataan yang sesuai dengan yang ada pada teks adalah pilihan jawaban A. Hal ini disebutkan pada teks, tepatnya pada paragraf ke-3, yakni kalimat " Cancer cells come from normal cells because of mutations of DNA "yang artinya "Sel kanker berasal dari sel normal karena adanya mutasi DNA." Di kalimat selanjutnya, dijelaskan bahasa mutasi DNA ini bisa terjadi karena banyak hal, seperti, terjadi secara begitu saja, karenaadanya radiasi nuklir dan elektromaknetik, virus, bakteri, jamur, parasit, dan masih banyak lagi. Dari paragraf tiga tersebut, kita bisa mengetahui bahwa sel-sel normal yang bermutasi ini, yang disebabkan oleh banyak hal, dapat menyebabkan kanker. Dengan demikian, bisa dikatakanbahwa sel normal yang telah bermutasi ini adalah sel yang tidak sehat. Oleh karena itu, dapat disimpulkan bahwa sel kanker berasal dari sel yang tidak sehat atau cancer cells come from unhealthy cells. Jadi, jawaban yang tepat adalah A.

Dari kelima pilihan jawaban, pernyataan yang sesuai dengan yang ada pada teks adalah pilihan jawaban A.

Hal ini disebutkan pada teks, tepatnya pada paragraf ke-3, yakni kalimat "Cancer cells come from normal cells because of mutations of DNA" yang artinya "Sel kanker berasal dari sel normal karena adanya mutasi DNA."

Di kalimat selanjutnya, dijelaskan bahasa mutasi DNA ini bisa terjadi karena banyak hal, seperti, terjadi secara begitu saja, karena adanya radiasi nuklir dan elektromaknetik, virus, bakteri, jamur, parasit, dan masih banyak lagi.

Dari paragraf tiga tersebut, kita bisa mengetahui bahwa sel-sel normal yang bermutasi ini, yang disebabkan oleh banyak hal, dapat menyebabkan kanker. Dengan demikian, bisa dikatakan bahwa sel normal yang telah bermutasi ini adalah sel yang tidak sehat.

Oleh karena itu, dapat disimpulkan bahwa sel kanker berasal dari sel yang tidak sehat atau cancer cells come from unhealthy cells.

Jadi, jawaban yang tepat adalah A.

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