Metabolic Activities of Bacteria

To test carbohydrate fermentation of bacteria, one must use nutrients broth with the following, except?

• monosaccharide

• peptone

• urea

• disaccharaide

Tags

NGSS.HS-LS2-3

Which of the following do not indicate carbohydrate fermentation?

• bubble at the top of durham tube

• yellow color of medium

• dark colored bacteria

• none of the above

Which of the follwoing is not true about gelatin?

• first used by Robert Koch

• Solid at temperature above 28 degree Celsius

• can be broken down by gelatinase enzyme

• all are true

What enzyme can be detected when using nutrient gelatin deeps?

What enzyme breaks down starch into monosaccharides and disaccharide?

What do this image indicate?

• positive in amylase enzyme

• positive in gelatinase enzyme

• positive in urease enzyme

• positive in caseinases enzyme

What enzyme is produce by some bacteria that breaks down caseins?

Letter C indicates __________.

• presence of caseinases

• absence of caseinases

Urease enzyme breaks down urea into _________.

• ammonia

• carbon dioxide

• protein

• two of the above

What is the pH indicator in Simmon's citrate medium?

• bromothymol pink

• bromothymol blue

• bromothymol green

• bromothymol yellow