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A classical secretory protein vary from a cytosolic protein by having a sequence about 13-35 amino acids long at its N-terminal end called as a signal peptide or signal sequence. The signal peptides of various secretory proteins vary in amino acid sequence but there are some regular features, for instance the center of the sequence commonly having of 10-15 hydrophobic amino acids. An signal hypothesis was proposed from early work in this area and predicted in which the signal peptide directs the secretory protein to the RER membrane and so goals the protein to cross into the RER lumen and be exported. The signal hypothesis has been explained to apply to protein secretion in plant, animal and bacterial cells.
The Henderson-Hasselbalch equation expresses the pH of a solution as: Select one: a. The equilibrium constant of the acid and the dissociated form of the weak acid. b. The
what are the excretory organs protozoa
Q. What are the symptoms of diverticulosis? Depending on the site of diverticula the symptoms may appear. It occurs most often in sigmoid colon and frequency increases with age
A vertical section of an ovule is shown below. The correct ploidy levels of the four structures P, Q, R and S respectively are: a. n, 2n, n, n b. 2n, n, n, n c.
main external morphological feature that differentiates platyhelminthes from nematodes
Q. How is excretion done in fishes? Fishes have a pair of kidneys that filtrate the blood, bony fishes excrete nitrogen as ammonia NH3 (they are ammoniotelic) and cartilaginous
Explain chilling temperatures - method of food Preservation? (a) Cellar storage temperatures (about 15° C): It is usually used for the storage of surplus foods like root crops,
Measurements of the level of pollution There are many factor for finding the level of pollution in the waste waters that generally find out the quantity of organic matter susp
Causes of Apomixis Apomictic species are generally hybrids or polyploids, as a consequence, there is irregular meiosis. Apomixis appears to be controlled by a set of genes. T
In a properly functioning negative feedback system, the A. value of the controlled variable will always be very close to the threshold value when the system is in steady state.
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