1. Based on following information: . E. coli cell is a cylinder about 2pm long a

Question

1. Based on following information: . E. coli cell is a cylinder about 2pm long and 1 um in diameter. Its total mass is about 1 pico gram, 70% of which is water and the half of the rest mass (dry mass) is protein. . Ribosome is a molecular complex with total molecular mass of 2.5x 10^6 Da. It is made of 1/3 of protein and 2/3 of RNA. In E. coli cells, about 20% of total protein is ribosome protein. . Mol-mass of water is 18 gram per Mol. (a) What's the number of ribosomes in one e coli cell? (b) What's the average distance between them if they distribute evenly in only 1/3 of the cell volume?

Explanation / Answer

a) 7,2000 ribosomes rae present in one E.coli cell. In dry mass the number is 870

b)?10 aa/sec

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