You Make Two Agar Plates: One Is a Nutrient Agar

question 80

Multiple Choice

You make two agar plates: one is a nutrient agar plate (plate A) that contains histidine and penicillin. The other is a glucose salts agar (plate B) that also contains penicillin. You inoculate a sample onto both plates using replica plating technique, incubate the plates, and compare the growth after 48 hours. There are 12 colonies on the nutrient agar plate and 11 colonies on the glucose salts medium. Which of the following statements is INCORRECT?

• A) The colony that is missing from plate B is an auxotroph that cannot synthesize histidine.
• B) that contains histidine and penicillin. The other is a glucose salts agar (plate
• C) The prototrophs are resistant to penicillin but the auxotrophs are sensitive to this antibiotic.
• D) that also contains penicillin. You inoculate a sample onto both plates using replica plating technique, incubate the plates, and compare the growth after 48 hours. There are 12 colonies on the nutrient agar plate and 11 colonies on the glucose salts medium. Which of the following statements is INCORRECT?
• E) Prototrophs and auxotrophs in this experiment are resistant to penicillin.

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Definitions:

Deduction

An expense that can be subtracted from gross income to reduce the amount of income subject to tax.

Revenue

The total income generated by the sale of goods or services related to a company's primary operations before any expenses are deducted.

Realized

Pertains to gains or losses that have been incurred as a result of actual transactions as opposed to those that are theoretical or projected.

Earned

Income or revenue that has been generated or received for goods sold or services provided.