If the cell were a factory, the lysosomes would function as the maintenance crew. The lysosome breaks down the enzymes and keeps the cell from working. The factory can not operate without the maintenance crew. The maintenance crews make sure that the factory is well conditioned to work.
Two genes, BRCA1, located on chromosome 17q21 (5,6), and BRCA2, located on 13q12-13 (7–9), have been shown to predispose to familial breast cancer.
<span>Sponges possess the defense mechanism of releasing toxins that make a predator</span>
