Chapter 6: Controlling the Growth of Microbes

Question 1

microorganisms that require increased moisture

Answer 1

hemidophilic

Question 2

removal of water ; drying process

Answer 2

desiccation

Question 3

defines whether a microorganism will grow or not

Answer 3

temperature

Question 4

microorganisms that grow best at high temperatures.

- provided with endospores

Answer 4

thermophiles

Question 5

one of the important thermophiles that is used as an indicator for autoclave

Answer 5

Bacillus stearothermophilus

Question 6

microbes that grow best at moderate temp / body temp (37deg)
- majority of pathogenic organisms

Answer 6

mesophiles

Question 7

microbes that prefer cold temperatures

• cold loving
• reason kung bakit may napapanis na food kahit nasa ref

Answer 7

psychrophiles

Question 8

particular group of psychrophiles that prefer refrigerator temp (4deg)

Answer 8

psychrotrophs

Question 9

microbes that prefer warm temperatures but can ENDURE very cold or even freezing temps
- mapagtiis lol

Answer 9

psychroduric organisms

Question 10

prefer a pH of 2 to 5

Answer 10

acidophiles

Question 11

prefer a pH of >8.5

Answer 11

alkaliphiles

Question 12

ex of alkaphiles that can cause cholera

Answer 12

Vibrio cholerae

Question 13

ex of acidophiles that grows in gastric juice and can cause gastritis

Answer 13

Helicobacter pylori

Question 14

ex of acidophiles that maintains vaginal pH

Answer 14

Lactobacillus acidophilus

Question 15

pressure that is exerted on a cell membrane by solutions both inside and outside of cell

Answer 15

osmotic pressure

Question 16

organism that requires increase of salt

Answer 16

halophilic

Question 17

movement of a solvent through a permeable membrane from a lower concentration to higher concentration

Answer 17

osmosis

Question 18

solution in which mas mataas yung salt sa external environment ng cell kesa sa loob ng cell, bacterial cell will SHRINK because lumabas yung solute from bacterial cell

Answer 18

hypertonic solution

Question 19

condition in which the cell membrane and cytoplasm of a cell shrink away from the cell wall when placed in a hypertonic solution
- tawag sa lumiit or nag shrink na bacterial cell

Answer 19

plasmolysis

Question 20

solution in which mas maliit yung solute sa labas ng cell kesa sa loob, mag BURST yung bacterial cell wall kasi papasok sa loob yung solute

Answer 20

hypotonic solution

Question 21

pag burst ng bacterial cell wall pag nilagay sa hypotonic solution

Answer 21

plasmoptysis

Question 22

concentration of solute outside the cell equals the concentration of solutes inside the bacterial cell

Answer 22

isotonic solution

Question 23

do not prefer living in salty environments but are capable of surviving ex. Staphylococcus aureus

Answer 23

haloduric organisms

Question 24

microbes that can survive in high atmospheric pressure

Answer 24

piezophiles

Question 25

prefers the same atmosphere that humans do (20-21% O2)

Answer 25

obligate aerobes

Question 26

require reduced concentration of oxygen

Answer 26

microaerophiles

Question 27

killed by the presence of oxygen

Answer 27

obligate anaerobes

Question 28

requires increased concentration of CO2

Answer 28

capnophiles

Question 29

increase in number of organism

Answer 29

bacterial growth

Question 30

E.coli generation time

Answer 30

20 mins