The genome of Escherichia coli consists of 4380 genes, encoding 4290 proteins, in just 5175720 base...

The genome of Escherichia coli consists of 4380 genes, encoding 4290 proteins, in just 5175720 base pairs. What percent fraction of the Escherichia coli genes encode proteins?

C. If the fraction of base pairs devoted to protein-coding genes is the same as the fraction of the total genes that they represent, what is the average number of base pairs per protein-coding gene? (Assume that there is no overlap of genes.) = ---------- base pairs per protein

Expert Solution

Total number of genes present = 4380

Total number of proteins encoded by the genes = 4290

Total number of base pairss = 5175720

Percent fraction of genes encoding proteins:

4290 of the total genes code for proteins, though 4380 genes are present in total.

Fraction of genes encoding proteins = Total number of genes encoding proteins / Total number of genes present

= 4290/4380 = 0.9795

Percent fraction of genes encoding proteins = Fraction of genes encoding proteins * 100 = 0.9795*100

Percent fraction of genes encoding proteins = 97.95%

Average number of base pairs per protein-coding gene:

If the fraction of base pairs devoted to protein-coding genes is same as the fraction of the total genes they represent, the number of proteins encoded by 4380 genes will be 4380.

Average number of base pairs per protein-coding gene = Total number of base pair / Number of proteins

= 5175720/4380 = 1181.6 = 1182

Average number of base pairs per protein-coding gene = 1182

gladiator answered 2 years ago

Some proteins are located in the periplasmic space of Escherichia coli (the compartment between the cell...

Some proteins are located in the periplasmic space of Escherichia coli (the compartment between the cell wall and the outer membrane). A technique known as osmotic shock selectively releases these proteins while leaving the cells otherwise intact. Why is this technique an advantage when you are interested in purifying proteins initially located in the periplasmic space?

What is the normal environment of Escherichia Coli?

The bacterium Escherichia coli (or E. coli) is a single-celledorganism that lives in the gut...

The bacterium Escherichia coli (or E. coli) is a single-celled organism that lives in the gut of healthy humans and animals. When grown in a uniform medium rich in salts and amino acids, these bacteria swim along zig-zag paths at a constant speed of 20 μm/s. The figure shows the trajectory of an E. coli as it moves from point A to point E. Each segment of the motion can be identified by two letters, such as segment BC. For the...

Briefly describe the Escherichia coli (E. coli) lac operon and its regulation.

Escherichia coli O157:H7 is a pathogenic strain of E. coli associated with consumption of raw or...

Escherichia coli O157:H7 is a pathogenic strain of E. coli associated with consumption of raw or undercooked foods. When exposed to temperatures above its normal growth temperature (temperatures that do not kill it), it may change its membrane lipid composition to counteract the rise in temperature. Which of the following changes would be most likely? Select one: a. A greater proportion of the unsaturated 16-carbon palmitoleate b. A greater proportion of the saturated 12-carbon laurate c. Generating a thinner membrane...

Researchers grew populations of identical Escherichia coli (E. coli) bacteria in a growth medium that contained...

Researchers grew populations of identical Escherichia coli (E. coli) bacteria in a growth medium that contained a low concentration of glucose and a high concentration of citrate, a substance that is not typically consumed by E. coli. For thousands of generations, the bacteria used only glucose as an energy source and grew relatively slowly (and to a low density because of the low concentration of glucose). After about 30,000 generations, one population emerged that began to rapidly grow to a...

Discuss the virulence characteristics of Escherichia coli strains that cause disease.

You are trying to design a protein that will be expressed in Escherichia coli and secreted...

You are trying to design a protein that will be expressed in Escherichia coli and secreted outside of the cell for purification and use as a pharmaceutical. E. coli is a gram-negative cell and the protein folds after it has exited the cell. Which secretion system would work best for this project? Support your answer with evidence based on the properties of E. coli, the protein and the secretion system.

The entire genome of the fruit fly Drosophila melanogaster consists of 1.65 x 108 base pairs...

The entire genome of the fruit fly Drosophila melanogaster consists of 1.65 x 108 base pairs (bp). If this organism’s DNA polymerase can copy DNA at the rate of 30 bp/sec calculate the minimum time (in days) required to replicate the entire genome. Remember there are 2 strands, and each are copied at the same time. 9,900,000,000 days 4,950,000,000 days 31.83 days 1909.7 days

. Why was Escherichia coli thought to be a dominant member of the human gut microbial...

. Why was Escherichia coli thought to be a dominant member of the human gut microbial community in the past? What populations ARE important in the human gut and what evidence do we have that the specific bacteria present are important for human health?

Question