Question

Question 7 (2 points) Which of the following is true concerning cancer cells?! They stop dividing in culture when growth factors are depleted. They evade the normal controls that trigger programmed cell death. They exhibit density-dependent inhibition when growing in culture. They must be attached to a substrate to divide in culture. Question 8 (2 points) Taxol is an anticancer drug extracted from the Pacific yew tree that binds to microtubules and prevents their depolymerization. Actively dividing cells treated x M Binox Lab. the setti

Answer 1

The answer to this question is B.

Cancer cells do not need external cues or signals to carry on with their activity. Growth factors are external signals that a normal cell would respond to and act accordingly. Cancer cells are the masters of their world.

Cancer cells very unfortunately do not possess density-dependent inhibition. When one tries to culture and grow these cells in culture plates, they can grow and grow even after the cells come in contact to each other, crowds the plate and begins to pile up on each other. Normal cells never behave this way.

Cancer cells do not need to be attached to a stratum to grow. They can grow just fine without tethering to a surface. This again makes them different from normal cells.

Cancer cells have internal machinery arranged in such a way as to evade natural programmed cell death mechanisms such as apoptosis. Apoptosis is triggered by a cell when there are beyond repair damages in DNA and other cellular machineries. But cancer cells can absolutely surpass any such cellular destructive cue originating in or out of the cell. They are invincible like that.