microbial growth and aerotolerance

Question 1

what is a bacterial colony?

Answer 1

• A visible cluster of bacterial growing on a solid piece of media.
• Colonies arose from a single bacterial cell.

Question 2

____loop between streaks and cool down

Answer 2

flame

Question 3

____ each quad numerous times proper intersections

Answer 3

streak

Question 4

what are the parts of colony morphology?

Answer 4

shape, margin, elevation, texture, pigment production

Question 5

types of shapes

Answer 5

round, irregular pinpoint

Question 6

types of texture

Answer 6

moist, mucoid, dry

Question 7

what is an obligate aerobic?

Answer 7

Requires the presence of oxygen for growth

Question 8

what is obligate anaerobic?

Answer 8

They cannot grow in the presence of oxygen. Oxygen is toxic to them.

Question 9

what is facultative anaerobic?

Answer 9

Grow in the presence or absence of oxygen, but prefer to use the
oxygen

Question 10

what is microaerophilic?

Answer 10

Requires oxygen, but at lower than atmospheric concentrations (2-
10%)

Question 11

what is aerotolerant anaerobes?

Answer 11

Grow in the presence or absence of oxygen but cannot use the
oxygen.

Question 12

what reducing agent creates an anaerobic environments deeper in. the tube allowing bacteria in the absence of oxygen?

Answer 12

thioglycolic acid

Question 13

what redox indicator turns pink in the presence of oxygen?

Answer 13

methylene blue/resazurin