While science cannot describe “thinking” in physical terms, we are certain that the process involves metabolism inside brain cells. With positron emission tomography (PET scan), it is possible to inject short-lived isotopes and image the regions of the brain that have the most active metabolism during various mental activities. However

The size of a RBC placed in a 1% salt  solution will

When a cell uses substantial energy to organize its cell contents to a greater degree than the organization that exists outside the living cell

Which of the following is an accurate statement regarding apoptosis?

Which is true about energy of activation?

The reason an increase in substrate concentration does not increase the reaction rate indefinitely is because

In certain cancerous cells, the cell divides continuously even in the absence of a growth factor (signaling molecule) that indicates the cell should divide. Which of the following could explain this?

Certain individuals with a Y chromosome develop into females because testosterone is unable to induce the formation of male sexual characteristics. This is most likely due to a defect in

Radioactive isotopes are used to tag proteins in the cell membranes of mouse cells. These cells are then fused with human cells in cultures. What is the likely outcome of the tagged mouse proteins?

All of the following correctly describe key differences or similarities between bacteria and archaea except