Question

The ras proto-oncogene can become an oncogene by a single point mutation that alters its protein product to have _______ activity.

A. more GTPase
B. less nucleotide exchange
C. greater nucleotide exchange
D. constitutive Raf-activation

Answer 1

The correct answer is D.

Step-by-step explanation:

The Ras Proto-Oncogene is a gene found in normal cells, which by the single point mutation mentioned in the question, can turn into Oncogene. Because Proto-Oncogene is a gene that controls and regulates the division of the cell, a mutation in this gene leads to uncontrolled cell divisions which then leads to cancer. The correct answer is D since RAF-Activation describes "Rapidly Accelerated Fibrosarcoma, fibrosarcoma being a cancer which affects fibrobalst cells.

I hope this answer helps.