Question: Explain why an Escherichia coli strain that is His is an auxotroph and one that is Lac is not.

Explain why an Escherichia coli strain that is His− is an auxotroph and one that is Lac− is not.

Step by Step Solution

★★★★★

3.37 Rating (175 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock

The metabolic roles that histidine and lactose play in Esch... View full answer

blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Document Format (1 attachment)

Word file Icon

477-M-S-B-M-B (658).docx

120 KBs Word File

Students Have Also Explored These Related Biology Questions!

Q:

Escherichia coli but not Pyrolobus fumarii will grow at 40 C, while P. fumarii but not E. coli will grow at 110 C. What is happening (or not happening) to prevent growth of each organism at the...

Q:

Why was Escherichia coli long thought to be a dominant member of the human gut microbial community?

Q:

Cells of Escherichia coli take up lactose via lac permease, glucose via the phosphotransferase system, and maltose via an ABC- type transporter. For each of these sugars describe: (1) the components...

Q:

After mutagenesis of wildtype Escherichia coli, you isolate a mutant strain that fails to grow when lactose is the sole carbon source in the medium, but that grows fine on other sugars. Further...

Q:

Case By any measure, Chipotle Mexican Grill was a success story in the restaurant business. It grew from one location in 1993 to over 2,000 locations by 2016 and essentially created the fast-casual...

Q:

The following thesis is a compilation of case studies in various areas of financial accounting that I completed over the course of two semesters under the advisory of Dr. Victoria Dickinson. During...

Q:

CASE STUDY 1 Odwalla, Inc. (A) Stephen Williamson's worst nightmares were about to come true. As chief executive officer of Odwalla, Incorporated, he was at the helm of a company worth nearly $400...

Q:

Please read the article and answers these questions 2) Briefly explain what is meant by "community onset" as used in the paper (based on context, not necessarily a definition you can look up). (1...

Q:

In order to determine whether Escherichia coli bacteria is present in the water sample taken from an unclean stream where different wastes are mixed, a)Which solid media do you prepare under...

Q:

BIO 181 LAB: ENZYMES II - Lab Write Up, To Go with Online Enzyme Labs Be sure to complete the online enzyme labs before following these directions. The regular in- class Lab Manual chapter Enzymes I...

Q:

An n-channel MOSFET has the following parameters: Assume the transistor is biased in the saturation region at VGS = 4 V.? (a) Calculate the ideal cutoff frequency.? (b) Assume that the gate oxide...

Q:

Vaughn Manufacturing has 23000 units in beginning finished goods. If sales are expected to be 100000 units for the year and Vaughn desires ending finished goods of 25000 units, how many units must...

Q:

What is true of the payout from a risk free rate?

Q:

During its first year of operations, Sugarsmooth, Inc. produced 55,000 jars of hand cream based on a formula containing 10 percent glycolic acid. Unit sales were 53,500 jars. Fixed overhead totaled...

Q:

The following information was taken from Charu Company's balance sheet: Fixed assets (net)............................$860,000 Long-term liabilities...........................200,000 Total...

Q:

A company reports the following: Cost of goods sold $510,000 Average inventory 60,000 Determine (a) The inventory turnover and (b) The number of days sales in inventory. Round to one decimal place

Q:

Williams Products Inc. manufactures and sells a number of items, including school knapsacks. The company has been experiencing losses on the knapsacks for some time, as shown by the contribution...

Q:

Analyze the selected not-for-profit's financial statements to determine if the statements conform to Financial Accounting Standards Board (FASB) guidance in Statement No. 117, Financial Statements of...

Q:

You are working on a large project and have determined that your CV is $50,000 and your EV is $125,000. What is your AC? A: $75,000 B: $50,000 C: $175,000 D: $125,000

Q:

a. Describe the difficulties in diagnosing endemic fungal infections that are acquired by travelers or nonnatives to endemic areas. b. Which forms of diagnostic testing will improve the likelihood of...

Q:

A male researcher wanting to determine the pathogenesis of a certain fungus that often attacks women did the following experiment on himself. He taped a piece of gauze heavily inoculated with the...

Q:

A worker involved in demolishing an older downtown building is the victim of a severe lung infection. a. Without any lab data, what two fungal infections do you suspect? b. What is your reasoning? c....

Q:

Customers arrive at an airline check-in desk according to a Poisson process with rate A = 2 per minute during the peak period. Suppose that with probability 0.4 an arriving customer will be a female...

Q:

You have recently been employed by a firm for a period of one year. The firm has given you the option of receiving your salary as a lump sum value of $30,000 at the end of the year or as 12 monthly...

Q:

You buy 100 SPDRs (Standard and Poor's Depositary Receipts) at $105 per unit. A SPDR is a Standard and Poor's Depositary Receipt. A SPDR is an exchange traded fund (ETF) that is designed to generate...