The cell cycle can be arrested in mitosis when a single sist…

The cell cycle can be arrested in mitosis when a single sister-chromatid pair is mono-oriented on the mitotic spindle. If at this point a glass microneedle is used to pull the mono-oriented chromosome toward the pole to which it is not attached, the cell proceeds to anaphase. This observation confirms that …

Some bacteria acquire resistance to antibiotics by gaining g…

Some bacteria acquire resistance to antibiotics by gaining genes that code for drug efflux pumps. These efflux pumps are proteins that move the drug from the inside of the cell to the outside before it is able to disrupt cellular processes.   Explain the process used by a bacterium to produce these efflux pumps.