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Deoxygenated blood flows from the vena cava into the right atrium, through the tricuspid valve into the right ventricle. When the ventricles contract blood is forced through the pulmonary valve into the p...

Therapeutic cloning produces stem cells which are genetically identical to the parent cell. Nucleus is removed and discarded from the donor egg cell = enucleated egg. Nucleus is removed f...

Firstly, the double stranded helical structure of the DNA is unwound by an enzyme called DNA helicase. This process of separation requires the breaking of the hydrogen bonds which link the base pairs. Aft...

The role of root hair cells is to absorb water and mineral ions. Therefore they have a large surface area to increase the rate of water absorption. Root hair cells also have a <...

Both the eukaryotic and prokaryotic cells have a cell surface membrane and contain cytoplasm and ribosomes. However, eukaryotic cells contain membrane bound organelles, such as mitochondria, nuclei, endop...