Ras, a small G protein located at the plasma membrane, is often mutated in different types of cancer. Ras normally signals to a cell that it should divide. Cancer cells divide uncontrollably. Which of the following changes to Ras would you expect to see in a cancer cell that has mutated Ras presentA. a mutation that means Ras cannot hydrolyze GTP to GDPB. a mutation that leads to Ras being sent to the endomembrane systemC. a mutation that means Ras cannot bind to GTPD. a mutation that means GDP is constantly bound to RasE. a mutation in which Ras cannot bind to its GPCR

A. a mutation that means Ras cannot hydrolyze GTP to GDP

Explanation:

Since Ras will remain in its active Ras-GTP form, Ras will continue to tell the cell to divide even when it is not correct to do so. This likely happens in cancer cells because of mutations in the Ras gene producing a Ras protein which can no longer be in its "off state" Ras-GDP.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.