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

Which intercellular junction allows for the rapid movement of small molecules or ions to flow from one animal cell to the next?

Which of the following might plausibly be said by a scientist?

The two isotopes shown below differ in the number of C612  C614

Which organelle has 13 rows of tubulin dimers around an empty central core?

Which of these is mismatched?