Micro Exam 2

Front 1

metabolism is the sum of all chemical reactions within a living organism

Back 1

TRue

Front 2

what is the process where complex organic compounds are broken down into smaller, simpler ones

Back 2

catabolism

Front 3

which of the following statements about anaerobic respiration is false

Back 3

It involves glycolysis only

Front 4

what is the fate of pyruvic acid in an organism that uses aerobic respiration

Back 4

It is oxidized in the Krebs cycle.

Front 5

how would a noncompetitive inhibitor interfere with a reaction involving the enzyme in the figure to the right

Back 5

It would bind to b.

Front 6

how would a competitive inhibitor interfere with a reaction involving the enzymes in the figure above

Back 6

it would bind to a

Front 7

which of the following is the best definition of oxidative phosphorylation

Back 7

The energy released as carrier molecules are oxidized is used to generate ATP

Front 8

a strictly fermentative bacterium produces energy

Back 8

By glycolysis only.

Front 9

which of the following factors can change the speed at which an enzyme catalyzes a reaction

Back 9

all of the above

Front 10

feedback inhibition is where ? feedbacks to the first enzyme in a pathway to stop the reaction from proceeding forward

Back 10

the product

Front 11

oxidation and reduction reactions do not have to be linked to one another. they can happen separately

Back 11

false

Front 12

substrate-level phosphorylation is where a substrate directly transfers a ? onto ADP

Back 12

phosphate group

Front 13

Photophosphorylation uses ? energy to generate ATP

Back 13

light

Front 14

Salts and sugars work to preserve foods by creating a

Back 14

hypertonic environment

Front 15

most bacteria fall into this group based on their preferred range of temperature

Back 15

mesophiles

Front 16

a culture medium on which one gram-positive organisms grow and a yellow halo surrounds staph aureus colonies is called

Back 16

selective and differential

Front 17

a culture medium consisting of agar, human blood and beef hear extract is a

Back 17

complex medium

Front 18

the source of nutrients in nutrient agar is

Back 18

peptone and beef extract

Front 19

which enzyme catalyzes the reaction 2h2o2=2h2o+o2

Back 19

Catalase

Front 20

The following data show growth of two bacteria on different media.

Amount of Growth
Staphylococcus aureus Streptococcus pyogenes
Nutrient agar ++ ++
Nutrient agar
+ 7.5% NaCl + -

Back 20

Facultative Halophile

Front 21

Which of the following best describes the pattern of microbial death?

Back 21

A. The cells in a population die at a constant rate.

Front 22

A disk-diffusion test using Staphylococcus gave the following results:
Disinfectant Zone of inhibition (mm)
A 0
B 2.5
C 10
D 5

In Table 7.1, which compound was the most effective against E. coli?

Back 22

E. can't tell

Front 23

A disk-diffusion test using Staphylococcus gave the following results:
Disinfectant Zone of inhibition (mm)
A 0
B 2.5
C 10
D 5
In Table 7.1, which compound was bactericidal?

Back 23

E) Can't tell

Front 24

MIC, is the maximum inhibitory

Back 24

False

Front 25

MBC, is the minimum bactericidal concentration

Back 25

True

Front 26

which of the following is not a method of resistance to antibiotics that bacteria take advantage of?

Back 26

DNA repair

Front 27

which of the following chemical surfactants is the most effective cleaner

Back 27

Quaternary amines

Front 28

which are principles of effective disinfection?

a. concentration

b. PH

c. time

Back 28

E. all of the above

Front 29

The Use-dilution test uses metal rings coated in dried test bacteria which are placed in disinfectant for 20 min at 20oC?

Back 29

False

Front 30

The disk diffusion method uses disk impregnated with chemicals overnight.

Back 30

true

Front 31

Phenols, phenolics and bisphenols disinfect by

Back 31

injuring the plasma membrane

Front 32

Biguanides disinfect by

Back 32

injuring the plasma membrane

Front 33

Halogens disinfect by

Back 33

injurying the plasma membrane

Front 34

Alcohol disinfect by

Back 34

inhibit protein and plasma membrane

Front 35

heavy metals disinfect by

Back 35

inhibit protein

Front 36

which are principles of effective disinfects

Back 36

all of the above

Front 37

the use-dilution test uses metal rings coated in dried test bacteria which are placed in disinfectant for 20 min at 20C

Back 37

false

Front 38

soaps can only degerm a surface

Back 38

true

Front 39

Quaternary amines disinfect by

Back 39

injuring the plasma membrane and protein denaturation

Front 40

food are preserved using

Back 40

combination of all above

Front 41

Aldehydes disinfect by

Back 41

inactivating protein

Front 42

plasma is used to disinfect tubing in or on surgical equipment

Back 42

true

Front 43

Supercritical fluids are used to disinfect medical implants, such as donor bone, tendons or ligaments

Back 43

true

Front 44

which one of the following most resistant to chemical biocides

Back 44

mycobacteria

Front 45

a pregnant woman should not change a cat liter box due to fear of toxoplasma

Back 45

true

Front 46

which of these causes atypical pneumonia

Back 46

mycoplasma pneumoniae

Front 47

the microbes for tetanus is

Back 47

Clostridium tetani

Front 48

which bacterial infection is spread by ticks

Back 48

Borrelia burgdorgeri and Ricketssia rickettsii

Front 49

which of the following is the principle causative agent of typhoid

Back 49

Salmonella typhi

Front 50

The cause Chagas disease is

Back 50

Trypanosoma cruzi

Front 51

this bacteria is found in contaminated cold cuts (deli meat) and cheese

Back 51

Listeria monocytognes

Front 52

The etiologic agent of fever blisters is

Back 52

Herpes simplex virus

Front 53

Candida albicans is

Back 53

yeast

Front 54

pork tapeworm which spread via fecal to oral

Back 54

Taenia Solium

Front 55

The patient has loose watery thought to be amoebic dysentery.

Back 55

Entamoeba histolytica

Front 56

Ebola is thought to be carried by

Back 56

fruit bats

Front 57

The following organisms are spread by fecal to oral transmission except

Back 57

flu

Front 58

rabies virus can be 100% fetal if the disease is allowed to progress in humans untreated

Back 58

true

Front 59

What animal is the host of mycobacterium lepae?

Back 59

armadillo

Front 60

what illness does giardia lamblia cause

Back 60

diarrhea

Front 61

how is shigella flexneri transmitted

Back 61

fecal to oral