Hippurate Hydrolysis Test | Theory & Results

The video explains the hippurate hydrolysis test, a method to determine if bacteria can hydrolyze hippurate using the enzyme hippuricase. The process involves breaking down hippurate into benzoic acid and glycine, with the latter reacting with ninhydrin to produce a bluish-violet color, indicating a positive test. The video details the reaction mechanism, the role of enzymes, and how to interpret test results.

What is the role of hippuricase in the hippurate hydrolysis test?

• It synthesizes hippurate.

• It colors the media blue.

• It reacts with ninhydrin.

• It breaks down hippurate.

Which enzyme activates benzoic acid in the hippurate hydrolysis process?

• Ninhydrin

• Benzoyl CoA synthetase

• NaCl transferase

• Hippuricase

What color indicates a positive result in the hippurate hydrolysis test?

• Red

• Green

• Bluish Violet

• Yellow

What is the purpose of using ninhydrin in the hippurate hydrolysis test?

• To break down benzoic acid

• To detect glycine

• To incubate bacteria

• To synthesize hippurate

What happens if the bacteria do not express hippuricase?

• The media turns green.

• The media remains clear.

• The media turns bluish violet.

• The media turns red.

What is the main product of hippurate hydrolysis that reacts with ninhydrin?

• Benzoic acid

• Glycine

• Phenylalanine

• Coenzyme A

What is the initial step in the hippurate hydrolysis test procedure?

• Adding ninhydrin

• Inoculating the media with bacteria

• Observing color change

• Breaking down hippurate