Lab final

Question 1

what is the purpose of starch hydrolysis test?

Answer 1

to know if an organism can hydrolyze starch

Question 2

what do you use to indicate starch hydrolysis test?

Answer 2

since the agar plate is clear, iodine is used to see determine the outcome

Question 3

signs of a positive starch hydrolysis test

Answer 3

clear zone around the line of growth after iodine has been added indicating the organism hydrolyzed the starch

Question 4

signs of a negative starch hydrolysis test?

Answer 4

a blue, purple, or black coloration

Question 5

principle of catalase test

Answer 5

to see if the organism can breakdown hydrogen peroxide

Question 6

signs of a positive or negative catalase test

Answer 6

• positive test will bubble indicating the breakdown of hydrogen peroxide
• negative no reaction

Question 7

What is a hemolysis test?

Answer 7

blood agar test used to determine if the organism eats/destroys red blood cell

Question 8

beta results?

Answer 8

organism eats all the blood

Question 9

Alpha results?

Answer 9

partially eats the blood, greenish color

Question 10

Gamma results?

Answer 10

no reaction, did not