oxygen requirements/ temperature ranges

Question 0

Microarrophiles

Answer 0

Require limited amount of atmospheric oxygen. Excess oxygen blocks the activity of oxidative enzyme.
= death
Growth in slightly below the surface

Question 1

Aerobes

Answer 1

Require pretense of atmospheric oxygen for growth.
Use O2 and final H acceptor to to oxidate high energy molecules ex, glucose
Surface growth

Question 2

Obligated anaerobes

Answer 2

Require absence of oxygen for growth

Oxidative enzyme requires precense of molecules other than O2

Question 3

Aerotolerant Anaerobes

Answer 3

Fermentative organisms.
Do not use O2 as a final electron acceptor.
Grow constant thought the medium.

Question 4

Facultative anaerobes

Answer 4

Can grow in absence or presence of O2.
Use O2 for anaerobic respiration.
Grow thought the medium mostly close to surface.

Question 5

Temperature range

Answer 5

With increasing temp Enzyme activity increases until the three dimensional configuration is lost because of denaturation of protein structure.

Lower temp toward freezing point- enzyme inactivation occurs and cellular metabolism gradually diminishes.

Question 6

Minimum growth temp

Answer 6

Lowest temperature at which growth will occur.

Due to enzyme and cell metabolic inactivation growth is negligible or absent.

Question 7

Maximum growth temp.

Answer 7

Highest temp at which growth will occur.

Above max temp most cell enzymes are destroyed and organism dies.

Question 8

Optimum growth temp

Answer 8

Rate of reproduction is most rapid

Not ideal for all enzymatic activity of cell.

Question 9

Temp- Phsycrophiles

Answer 9

Bacterial that would grow within temp range of 0-20*C.

Characteristic- grow between 0 and 5*C

Question 10

Temp- Mesophiles

Answer 10

Bacteria that will grow at temp. Range of 20-45 *C

Char.- ability to grow at human body temp. 37C and inability to grow above 45C

Question 11

Mesophile- plant saprophytes

Answer 11

Optimum growth temp 20-30*C.

Question 12

Mesophile- Parasyte

Answer 12

Optimum growth temp. 35-40*C

Prefer to grow in warm blooded host.

Question 13

Thermophiles

Answer 13

Bacteria that will grow at 35*C and above

Question 14

Facultative thermophile

Answer 14

Organism that grow at 35C with optimum growth temp. Of 45-60C.

Question 15

Obligated Thermophiles

Answer 15

Organisms that will grow in temp above 50*C

Optimum growth temp above 60*C