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Signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor. In words, this receptor change intracellular molecules changes a response. There are two levels in this procedure: the signaling molecule activates a particular receptor protein on the cell membrane. A 2nd messenger transfers the signal into the cell and eliciting a physiological response. In either level the signal can be amplified. Whereas, one signalling molecule can cause several responses. Gene activations and metabolism alterations are instances of cellular responses to extracellular stimulation which requires signal transduction.
How are bacteria classified according to the production of organic material for the energetic metabolism? Most bacteria are heterotroph, they do not produce their own food. The
explain the role of photophosphorylation and chemiosmosis in photosynthesis
The nucleus has an inner and an outer membrane and is perforated through 3000-4000 nuclear pores. Each pore having of a nuclear pore complex of more than 100 several proteins organ
MUSCLES - In eye orbit, eye ball is fixed by 6 skeletal muscles attached to 3rd, 4th & 6th cranial nerves (motor). 4 - straight or recti muscles are present. 2 - oblique
Radioactive Labelling Radioactive labelling method has been effectively applied on the chick blastoderm. The method includes labelling one embryo (donor) and grafting a part
Q. In the long term which are the organs affected by chronic Chagas' disease? In the chronic stage of Chagas' disease, that manifests years after the infection, the trypanosoma
Q. How do the potassium and sodium ions maintain the resting potential of the neuron? The plasma membrane of the neuron when at rest maintains an electric potential difference
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what is cytoskeleton
Name that gelatin-like substance which is prepared from different species of red algae growing in Asiatic waters. Prepared product appears in the form of cakes, coarse granules and
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