lab exam 2

Question 1

Red slant - yellow butt K/A

Answer 1

K/A glucose fermentation only, peptone catabolized

Question 2

yellow slant - yellow butt A/A

Answer 2

A/A Glucose and lactose and/or sucrose fermentation.

Question 3

red slant - red butt K/K

Answer 3

K/K No fermentation, Peptone catabolized.

Question 4

Yellow/Yellow with bubbles A/A, G

Answer 4

A/A,G Glucose and lactose and/or sucrose fermentation, Gas produced.

Question 5

Red/Yellow with bubbles K/A,G

Answer 5

K/A,G Glucose fermentation only, Gas produced.

Question 6

Red/Yellow with bubbles and black precipitate K/A, H2S

Answer 6

K/A,G,H2S Glucose fermentation only, Gas produced, H2S produced.

Question 7

Yellow/Yellow with bubbles and black precipitate A/A,G,H2S

Answer 7

A/A,G,H2S Glucose and lactose and/or sucrose fermentation, Gas produced, H2S produced.

Question 8

Red/Yellow with black precipitate K/A,H2S

Answer 8

K/A,H2S Glucose fermentation only, H2S produced.

Question 9

Yellow/Yellow with black precipitate A/A,H2S

Answer 9

A/A,H2S Glucose and lactose and/or sucrose fermentation, H2S produced.