An E. coli cell contains about 2.6 × 108 ions, which constitute about 1% of the mass of the cell, and each ion has an average molecular mass of 40 g. Solve, (a) What is the approximate mass of the cell? (b) The same cell contains about 2 × 108 carbohydrate molecules, which have an average molecular mass of 150 g · mol−1. Approximately what percentage of the cell’s mass is carbohydrate? (c) The molecular mass of E. coli DNA is about 5.6 × 109 g · mol−1, and it accounts for about 0.6% of the cell’s mass. How many DNA molecules does the cell contain?
An E. coli cell contains about 2.6 × 108 ions, which constitute about 1% of the mass of the cell, and each ion has an average molecular mass of 40 g. Solve, (a) What is the approximate mass of the cell? (b) The same cell contains about 2 × 108 carbohydrate molecules, which have an average molecular mass of 150 g · mol−1. Approximately what percentage of the cell’s mass is carbohydrate? (c) The molecular mass of E. coli DNA is about 5.6 × 109 g · mol−1, and it accounts for about 0.6% of the cell’s mass. How many DNA molecules does the cell contain?
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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An E. coli cell contains about 2.6 × 108 ions, which constitute about 1% of the mass of the cell, and each ion has an average molecular mass of 40 g. Solve, (a) What is the approximate mass of the cell? (b) The same cell contains about 2 × 108 carbohydrate molecules, which have an average molecular mass of 150 g · mol−1. Approximately what percentage of the cell’s mass is carbohydrate? (c) The molecular mass of E. coli DNA is about 5.6 × 109 g · mol−1, and it accounts for about 0.6% of the cell’s mass. How many DNA molecules does the cell contain?
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