Excelsior Practice Test B

Front 1

Wendell stanley

Back 1

Crystallized tobacco mosaic virus(TMV)

Front 2

Violet light

Back 2

Improves resolution due to shorter wavelength

Front 3

ATP and proton motive force can be considered equivalent because

Back 3

Proton motive force synthesizes ATP

Front 4

Folic acid functions as a coenzyme for which process

Back 4

Synthesis of purines

Front 5

Which type of enzymes do plasmids encode

Back 5

Antibiotic resistance

Front 6

Bacterial cell wall

Back 6

Prevents the cell from swelling and rupturing

Front 7

Chemoautotrophs

Back 7

Use CO2 as a carbon source and Inorganic nitrates as energy source

Front 8

Phenotype is

Back 8

Expressed properties

Front 9

Prokaryotic flagella

Back 9

Move by rotation

Front 10

Eukaryote flagella

Back 10

Move by wave or ripple action

Front 11

Protozoa

Back 11

Eukaryote, unicellular, move by cilia or flagella, chemoorganotrophic

Front 12

Antigenic shift in influenza

Back 12

Changes Protein composition of the spikes

Front 13

When a competitive inhibitor binds to an enzyme

Back 13

Reaction rate increases by increasing substrate concentration

Front 14

Lytic and lysogenic cycles of bacteriophages differ

Back 14

In their ability to exist as prophage in host cell

Front 15

Vegetative cells

Back 15

Are killed at temps above 70 degrees celcius

Front 16

Bacterial endospores

Back 16

Survive 100 degree celcius

Front 17

Filtration

Back 17

Used to separate bacteria from suspending liquid

Front 18

Which substances kill microorganisms by replacing the hydrogen of carboxyl, sulfhydryl, or amino groups

Back 18

Aldehydes

Front 19

Strength of UV rays used in lamps to sterilize surfaces

Back 19

260 mm

Front 20

Vancomycin

Back 20

Inhibits cell wall synthesis

Front 21

Filtration

Back 21

Most practical for heat sensitive solution of vitamins because it allows only smaller size particles to be removed

Front 22

Antimicrobial agent that has mode of action most like vancomycin

Back 22

Cephalothin (both inhibit cell wall synthesis)

Front 23

Which agent inhibits replication of bacterial DNA by inducing formation of thymine dimers

Back 23

UV light

Front 24

Tetracyclines

Back 24

Inhibit translation

Front 25

What antigens elicit an antibody response in humans

Back 25

Numerous different antigenic determinants

Front 26

IgA

Back 26

Antibody isotope that contains secretory component and can transport across membranes

Front 27

IgE

Back 27

Attaches to mast cells

Front 28

IgG

Back 28

No secretory component, passes through blood vessels and placenta

Front 29

IgM

Back 29

5 monomers bound by a J Chain

Front 30

Type O blood

Back 30

Anti-A and anti-B antibodies, lacks A and B antigens

Front 31

Vaccines

Back 31

Artificial, active immunity

Front 32

Neutrophils

Back 32

Most actively phagocytic

Front 33

Basophils

Back 33

Release antihistamines

Front 34

Lymphocytes

Back 34

Produce antibodies

Front 35

Polymorphonuclear leukocytes (PMN/segmented neutrophils)

Back 35

Migrate to site of infection

Front 36

Streptokinase

Back 36

Enzyme produced by strep that destroys clots allowing organism to spread

Front 37

Hemolytic reaction in newborns

Back 37

Mom is Rh neg and baby Rh positive

Front 38

A gram positive bacterium is exposed to enzyme lysozyme

Back 38

Lysozyme will degrade the mucopeptide layer of the cell wall causing lyse

Front 39

Lysozyme

Back 39

Catalyzes the hydolysyis of gram positive bacteria

Front 40

Clostridium

Back 40

Neurotoxin that can cause double vision, dizziness and muscle paralysis

Front 41

HIV transmission to newborns

Back 41

Detected through PCR because IgG antibody production is delayed

Front 42

Zidovudine

Back 42

Blocks DNA synthesis in AIDS

Front 43

Diphtheria toxin

Back 43

Produced when bacteria are infected by lysogenic phage carrying the tox gene

Front 44

Giardiasis

Back 44

Assosiated with untreated water (streams)

Front 45

Clostridium perfringens

Back 45

Produces enxzymes that degrade protein leading to gas gangrene

Front 46

Gummas

Back 46

Tumors associated with syphilis

Front 47

Chlamydia

Back 47

Obligate intercellular planctomycete

Front 48

Phosphate and nitrogen

Back 48

Increases rate of bioremediation in oil spills

Front 49

Sedimentation

Back 49

Primary treatment of sewage

Front 50

Oil degrading bacteria

Back 50

Heterotrophs that oxidize oil as a source of carbon and energy

Front 51

Sugar

Back 51

Induces plasmolyzation of bacteria by binding with water

Front 52

Penicillin

Back 52

Bacterial my synthesized secondary metabolite