Microbio Lecture Exam I - Part 3

Front 1

Bacteria grow via

Back 1

Binary Fission

Front 2

Inward pinching of the cell membrane and cell wall to separate cell into two identical cells

Back 2

Cytokinesis

Front 3

Bacteria produce Asexually or Sexually?

Back 3

Asexually

Front 4

A shorter doubling time means a ________ incubation time

Back 4

Shorter

Front 5

Before cell division begins, metabolic processes occurring

Back 5

Lag phase

Front 6

Exponential growth phase, more susceptible to antibiotics, symptoms develop

Back 6

Log phase

Front 7

Death rate becomes equal to reproduction rate

Back 7

Stationary phase

Front 8

Waste products outpace growth, rapid die-off

Back 8

Decline phase

Front 9

Highly resistant survival structures formed by species of Bacillus and Clostridium

Back 9

Endospores

Front 10

Nutrients must be dissolved in ______, which makes up 70-90% of the cell

Back 10

Water

Front 11

Feed on light energy

Back 11

Phototrophs

Front 12

Feed on inorganic or organic compounds

Back 12

Chemotrophs

Front 13

Feed on CO2

Back 13

Autotrophs

Front 14

Feed on organic carbon sources

Back 14

Heterotrophs

Front 15

Process a biosynthesis of polysachharides, lipids, amino acids, proteins, purines & pyramidines

Back 15

Chemoheterotrophs

Front 16

Thrive in Human range temperatures, 10 to 48C

Back 16

Mesophiles

Front 17

Thrive in -10 to 20C range

Back 17

Psychrophiles

Front 18

Thrive in 40 to 75C

Back 18

Thermophiles

Front 19

Thrive in 65 to 110C

Back 19

Hyper Thermophiles

Front 20

Most cells grow at a pH level of ____

Back 20

7

Front 21

Prokaryotes tolerant of pH in the lower ranges (0-6). Used in yogurt, cheese and other dairy production

Back 21

Acidophiles

Front 22

Organisms that require oxygen to survive

Back 22

Obligate Aerobes

Front 23

Organisms that prefer a lower O2 level than normal air

Back 23

Microaerophiles

Front 24

Organisms that do not or cannot process air

Back 24

Anaerobes

Front 25

Organisms that are not effected by the presence of O2

Back 25

Aerotolerant

Front 26

Organisms to which O2 is toxic

Back 26

Obligate anaerobes

Front 27

Organisms that need both low O2 and high CO2

Back 27

Capnophilic

Front 28

Organisms that can tolerate exceedingly high hydrostatic pressures

Back 28

Barophiles

Front 29

Salt-tolerant prokaryotes

Back 29

Halophiles

Front 30

Organisms that require high osmotic pressures regardless of content

Back 30

Osmophiles