The first step in the process of generating embryonic stem cells is to remove the nucleus from an unfertilized egg cell (A). Because the egg cell is only 100 micrometers, or one-tenth of a ...

The stages outlined in the following example show a cell with a diploid chromosome number of four (two sets of two chromosomes) undergoing cell division. The replicated chromosomes are not visible ...

This suggests that aging is not a linear process but instead a developmental stage sparked by specific molecular cues. "Some cells greatly expand in number while others drop off, and the cells ...

In a hair follicle cell, a protein called keratin is made. Lots of it. Many ribosomes can be working on a single strand of mRNA at once. Protein synthesis isn't a slow process, either. A protein ...

A cell protein previously believed only to provide a scaffolding for DNA has also been shown to directly influence DNA transcription into RNA – the first step of the process by which an organism’s ...