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SIM, Indole, Sulfer reduction tests (week 6)

Authored by Kristen Gragert

Science

University

SIM, Indole, Sulfer reduction tests (week 6)
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19 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which bacteria are especially differentiated using the SIM test?

Escherichia coli and Bacillus

Salmonella and Shigella

Staphylococcus and Streptococcus

Pseudomonas and Clostridium

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the sulfur test in the SIM test detect?

Reduction of sulfur to sulfur dioxide

Reduction of sulfur to hydrogen sulfide gas

Oxidation of sulfur to sulfuric acid

Conversion of sulfur to sulfate ions

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What compound in the media reacts with hydrogen sulfide gas in the sulfur test?

Sodium chloride

Ferrous ammonium sulfate

Potassium nitrate

Calcium carbonate

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the visual indicator of a positive sulfur reduction in the SIM test?

Media turns yellow

Media turns black

Media turns red

Media turns blue

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What enzyme do some organisms have that breaks down the amino acid tryptophan?

Tryptophanase

Amylase

Lactase

Protease

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the products of the breakdown of tryptophan by tryptophanase?

Indole and pyruvate

Glucose and fructose

Lactose and galactose

Maltose and sucrose

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What reagent is used to test for the presence of indole?

Kovac’s Reagent

Benedict’s Reagent

Biuret Reagent

Fehling’s Solution

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