1. Do we (humans) have Restriction Endonuclease?
In September 1986, Pubmed journal showed the evidence that there is Restriction Endonuclease present in humans. The presence of HsaI was identified. It was isolated from human embryo using tissue and cell extracts. The authors are Lao W.D. and Chen S.Y. It was found to be a TypeII and similar to EcoRI, although functionally differed. But till now nothing more is known about these HsaI enzyme.
2.Do Apoptosis occur in Bacteria?
As a function of Programmed cell death the bacteria die giving rise to newer cells either by spore formation or fruiting bodies. The cell death of bacteria is a fate of it written at genome level. Hence it is necessary for developmental stages, newer cell growth and increase in population.It also doesn't hamper other cells surrounding it, which proves another criteria.We can call it Apoptosis.
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