Indicate whether each of the following descriptions applies to an oncogene, a pr
ID: 260211 • Letter: I
Question
Indicate whether each of the following descriptions applies to an oncogene, a proto-oncogene, or a tumor suppressor gene. Some descriptions may apply to more than one of these gene types. Explain your answer. a. A type of gene found in normal cell b. A gene that could encode a normal growth factor C. A type of gene found in cancer cells d. A type of gene found only in cancer cells e. gene(s) whose presence can cause cancer. f. gene(s) whose absence can cause cancer. g. type of gene(s) found in normal cells and cancer cells.Explanation / Answer
a)proto oncogene and tumor supressor gene are found in normal cell.protooncogene upon mutation form oncogene which cause cancer.tumor supressor gene inhibits tumor and when it gets inactivated causes cancer.
b)proto oncogenes code for proteins that help to regulate cell growth and differentiation.
c)oncogenes are found in cancer cells which are formed after mutation of proto oncogenes.Tumor supressor genes are also present in cancer cells in inactivated form.
d)oncogene are found only in cancer cell.
e)presence of oncogenes can cause cancer.
f)absence of tumor supressor genes or in inactivated condition can cause cancer.
g)tumor supressor genes are found in both normal cells and cancer cell but in normal cell it is in active condition and in cancer cells it is in inactivated condition.