Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Microbiology lab > Lab 29, 30, 53 > Flashcards

Lab 29, 30, 53 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Is the growth of bacteria affected by water?

A

yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is water availability also called?

A

water activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is water activity?

A

ratio of vapor pressure of solution to water pressure to pure water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how does water availability vary?

A

with the solution example salt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is osmosis?

A

areas of low solute to areas of high concentration where water is less

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is hypotonic?

A

solute concentration is lower on the outside are lower than the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

are bacteria harmed by hypotonic solutions?

A

no because of the rigid cell wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is isotonic?

A

same inside and outside the cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is hypertonic?

A

greater outside than in the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is plasmolysis?

A

water loss or dehydration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is a halophile?

A

high concentrations of Na to grow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are osmophiles?

A

they can tolerate sugar

example xeromyces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

why is ultraviolet light dangerous for bacteria?

A

has mutagenic properties at 260

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

why is 260 nm so effective?

A

point at which DNA absorbs UV light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what happens when DNA absorbs light?

A

become a pyrimidine dimer

form when cystein and thymine make a bridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How do cells handle mutated DNA?

A

SOS system

17
Q

what is the SOS system?

A

enzymatically removes dimers and inserts new pyrimidine molecules

18
Q

Are endospores resistant to UV light?

A

yes, because of their cell wall

19
Q

How does Strep differ from staph?

A

occur in chains

lack enzyme catalase

20
Q

Is streptococci common?

A

yes

21
Q

What are so e examples of streptococci in the gut?

A

Efeaciem

22
Q

What is beta hemolytic?

A

Cayuse lysis in red agar

They produce o or s lysis

23
Q

What us alpha hemolytic

A

Lysis of red cells,

Loss of potassium

Microbiology lab (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions