Lab 4: Environmental Effects

Question 1

_______: grow best at relatively high temperatures (between 40C and 90C)

Answer 1

thermophiles

Question 2

_________: Grow best at intermediate temperatures (such as the human body)

Answer 2

mesophiles

Question 3

_______: grow best at relatively low temperatures

Answer 3

psychrophiles

Question 4

________: a metabolically inert structure that does not grow or divide but is resistant to the effects of temperature

Answer 4

endospore

Question 5

a solution that has no net movement of water

Answer 5

isotonic

Question 6

water moves out of the cell, causing cytoplasm to shrink

Answer 6

hypertonic

Question 7

water moves into cell causing cell to burst if the wall is weak or damaged

Answer 7

hypotonic

Question 8

microbes that want to grow in high salt concentrations?

Answer 8

halophiles

Question 9

what is an acid?

Answer 9

a high concentration of protons

Question 10

What is a base?

Answer 10

a low concentration of protons

Question 11

microbes that prefer to grow at a pH near neutral?

Answer 11

neutralophiles

Question 12

microbes that grow optimally in acidic environments?

Answer 12

acidophiles

Question 13

microbes that grow best at high pH?

Answer 13

alkalophiles