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DNA helicase breaks the hydrogen bonds between the two strands of the DNA helix, separating them. Each strand can then act as a template for the synthesis of new DNA. Free nucleotides can then attach to t...
Although DNA and RNA belong to the same class of biological molecules, they have many differences in their structure and the location at which they are found. Firstly, RNA is a single polynucleotide...
Blood glucose is controlled via a negative feedback mechanism. High blood glucose is detected by B-cells of the Islets of Langerhans in the pancreas, and in response to this, these cells secrete insulin. ...
Passive transport requires no energy and is dependent on concentration difference gradient of intra and extracellular spaces. Channel protein can be opened or closed to allow or stop the free flow of mole...
In platyhelminthes digestion is both intracellular and extracellular whereas in annelida and chordata digestion is completely extracellular.
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