Sentences with phrase «surrounding cytoplasm»

Although the evidence was subsequently contested, some single - celled microbial life lacking a nucleus that segregates their internal DNA or RNA («prokaryotes») from the surrounding cytoplasm may have flourished in darkness within cracks in Earth's seafloor crust and around deep, warm or boiling hot ocean springs (hydrothermal or volcanic vents, such as at Lost City or at black smokers) without a need for light or free oxygen in the oceans or atmosphere.

However, Guo says, there are also «many minispoons» stirring up the surrounding cytoplasm, in the form of proteins and molecules that, every so often, actively push vibrating organelles around like billiard balls.

Now engineers at MIT have found that these organelles and other intracellular components may experience the surrounding cytoplasm as very different environments as they travel.

They interpreted that force as the mechanical resistance of the surrounding cytoplasm.

Not exact matches

With an egg where the cytoplasm surrounding a nucleus isn't good, we can take the nucleus and transfer it into a healthy donor egg.

In the mid-1990s, Jacques Cohen and Jason Barritt at the Institute for Reproductive Medicine and Science of Saint Barnabas in New Jersey wondered whether some women could not have babies because of defects in the cytoplasm of their eggs — the fluid surrounding the nucleus.

Cytoplasmic transfer involves injecting a bit of cytoplasm — the jellylike substance that surrounds the nucleus of an egg — from a healthy donor egg into the egg of an infertile woman before the egg is fertilized.

In particular, these characteristics determine how easily it can push against a cytoplasm's surrounding water and move through its ever - changing web of cytoskeletal protein structures.

When a sperm cell meets an egg cell (the oocyte), it burrows through the thick outer rind surrounding the egg (the zona pellucida), enters the internal cytoplasm of the egg (the ooplasm), and locomotes its male DNA — half of the typical number of chromosomes — to the female half within about three to four hours.

Each cell contains hundreds to thousands of mitochondria, which are located in the fluid that surrounds the nucleus (the cytoplasm).