1. The main difference between a malignant tumor and a benign tumor is A. malign
ID: 96088 • Letter: 1
Question
1. The main difference between a malignant tumor and a benign tumor is
A. malignant tumor cells causes neighboring cells to mutate.
B. malignant tumor cells attack and phagocytose neighboring normal tissue cells.
C. malignant tumor cells invade other tissues
D. malignant tumor cells always proliferate faster
E. All of the above are differences between malignant tumor cells and benign tumor cells.
F. None of the above are correct
2.Which of the following genetic changes cannot convert a proto-oncogene into an oncogene?
A. A mutation in the promoter of the proto-oncogene, causing the normal protein to be transcribed and translated at an abnormally high level
B. A mutation that introduces a stop codon immediately after the codon for the initiator methionine.
C. A mutation within the coding sequence that makes the protein hyperactive
D. An amplification of the number of copies of the proto-oncogene, causing overproduction of the normal protein.
Explanation / Answer
Answer:
1. The main difference between a malignant tumor and a benign tumor is
A. malignant tumor cells causes neighboring cells to mutate.
B. malignant tumor cells attack and phagocytose neighboring normal tissue cells.
C. malignant tumor cells invade other tissues - Correct Answer (Malignant tumor invades neighboring cells, tissues and organs and spreads to other parts of the body)
D. malignant tumor cells always proliferate faster
E. All of the above are differences between malignant tumor cells and benign tumor cells.
F. None of the above are correct
2.Which of the following genetic changes cannot convert a proto-oncogene into an oncogene?
A. A mutation in the promoter of the proto-oncogene, causing the normal protein to be transcribed and translated at an abnormally high level
B. A mutation that introduces a stop codon immediately after the codon for the initiator methionine - Correct Answer (due to stop codon the proto-oncogene would not be translated and this mutation would not convert a proto-oncogene into an oncogene)
C. A mutation within the coding sequence that makes the protein hyperactive
D. An amplification of the number of copies of the proto-oncogene, causing overproduction of the normal protein.
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