With the exception of red blood cells, which contain no nucleus and no nuclear DNA, every one of these cells contains the human genome -- a string of three billion A's, C's, G's, and T's.

Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles ...

Red blood cells for example, have no nucleus, so they can hold more oxygen. They're also biconcave or disc-shaped to absorb oxygen more quickly and rounded to flow easily through tiny capillaries.

Mitosis is a process of nuclear division in eukaryotic cells that occurs when ... the nuclear envelope that encloses the nucleus breaks down, and the nucleus is no longer separated from the ...

Organelles in cells were originally often independent cells, which were incorporated by host cells and lost their ...

This nuclear material will no longer be needed ... that will ultimately help to establish embryonic stem cells. Next, we inject the nucleus (at arrow) from a donor cell into the enucleated ...

Only recently has the ribosome—one of the oldest molecular machines in evolutionary terms—been recognized as an active ...