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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 organized in a hexagonal array. Whereas little molecules can pass by the pore by free diffusion and large proteins entering the nucleus need a nuclear localization signal. That is four to eight amino acids long and is rich in the positively charged amino acids arginine and lysine as well as commonly having proline, and is situated internally within the polypeptide chain. The protein is taken by the pore in an ATP- requires step and enters the nucleus without cleavage of the localization signal.
Figure: Uptake of proteins into the mitochondrial matrix
Counter current flow - Respiration Each filament has an upper and a lower row of flat lamellae. The lamellae of successive filaments are in close contact. Gas exchange takes p
In what form is most carbohydrate taken in the normal diet? Most carbohydrate is taken normal diet in as starch.
Making individual rock collections Peoples should be encouraged to make their own collection of rocks. Small pasteboard or cigar boxes will serve to be the collections. The spe
Q. Why is the proximity between amino and ribosomes acids important for the protein formation? What is the enzyme that catalyzes that reaction? The proximity between amino and
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A 70-year old woman presents with a 1-hour history of crushing substernal chest pain. Shortly after admission, the patient expires. An autopsy reveals calcium deposits in the intim
The parasite completes a part of its life histroy in man in two stages. They are : a) Pre-Erythrocytic cycle. b) Erythrocytic cycle. 1. When an infected female Anopheles mosquit
Q. What is Cardiac tamponade? Cardiac tamponade is that situation where increase in pericardial fluid raises the intrapericardial pressure which interferes with diastolic filli
Response to Wounding Wounding of tomato plants by mechanical injury or chewing by insects releases a factor that triggers accumulation of two proteinase inhibitors-throughout
Define Functions of Calcium in Human Body? Calcium salts provide rigidity to the skeleton and calcium ions play a role in many if not most, metabolic processes. In the vertebra
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