MICR 290 EXAM 4 QUESTIONS WITH 100%
CORRECT ANSWERS!!
toxic form if O2 molecule that has an extra electron on its shell is called
superoxide anion
additional of a drop of hydrogen peroxide onto a colony of bacteria grown in petri plates
resulted in generation of gas bubbles in form of foam. which enzyme of those bacteria
generated the formation of the gas bubbles?
catalase
Alcohols are used for
antisepsis and disinfection
all of the following antibiotics are vidal except
Erythromycin
assuming that the random rate of mutation in bacteria is 1 in 10 million, what would the
rate of mutation be, if bacteria are exposed to a mutagen that increases the rate of
mutation by 1000 times?
1 in 10,000
Bacteria reproduce by the process of
binary fission
basic molecular structure of all of the following components is the same in prokaryotes and
eukaryotes except for this structure, which is smaller in prokaryotes
ribosomes
differences in quantity of which of the following components of bacterial cell wall
contributes most to the differences in the gram reactivity following a gram stain?
peptidoglycan
, during which phase of the growth curve, bacteria are most susceptible to the action of
penicillin
log phase
for this process, which is safe for living tissues, betadine, which has reduced germ killing
strength is used
antisepsis
from left to right, which of the following sequence of organisms are in the right order from
largest to smallest size
worm - protozoa - bacteria - virus
how many nanometers is a microbe that is 2 micrometers long
2,000
in genetic engineering, which of the following enzymes are used to cut DNA at specific cites
restriction endonucleases
in the science of bacteriology, the term growth usually refers to an increase in
number of bacterial cells
in which of the following categories of microorganisms, transcription and translation are
coupled
bacteria
inserting a human gene into bacteria which produce the product of that gene is example of
recombinant DNA technology
lowest temp that kills all bacterial cells in a broth culture in 10 min is called
thermal death point
milk which has been pasteurized by this method has the longest shelf life
ultra high temp
CORRECT ANSWERS!!
toxic form if O2 molecule that has an extra electron on its shell is called
superoxide anion
additional of a drop of hydrogen peroxide onto a colony of bacteria grown in petri plates
resulted in generation of gas bubbles in form of foam. which enzyme of those bacteria
generated the formation of the gas bubbles?
catalase
Alcohols are used for
antisepsis and disinfection
all of the following antibiotics are vidal except
Erythromycin
assuming that the random rate of mutation in bacteria is 1 in 10 million, what would the
rate of mutation be, if bacteria are exposed to a mutagen that increases the rate of
mutation by 1000 times?
1 in 10,000
Bacteria reproduce by the process of
binary fission
basic molecular structure of all of the following components is the same in prokaryotes and
eukaryotes except for this structure, which is smaller in prokaryotes
ribosomes
differences in quantity of which of the following components of bacterial cell wall
contributes most to the differences in the gram reactivity following a gram stain?
peptidoglycan
, during which phase of the growth curve, bacteria are most susceptible to the action of
penicillin
log phase
for this process, which is safe for living tissues, betadine, which has reduced germ killing
strength is used
antisepsis
from left to right, which of the following sequence of organisms are in the right order from
largest to smallest size
worm - protozoa - bacteria - virus
how many nanometers is a microbe that is 2 micrometers long
2,000
in genetic engineering, which of the following enzymes are used to cut DNA at specific cites
restriction endonucleases
in the science of bacteriology, the term growth usually refers to an increase in
number of bacterial cells
in which of the following categories of microorganisms, transcription and translation are
coupled
bacteria
inserting a human gene into bacteria which produce the product of that gene is example of
recombinant DNA technology
lowest temp that kills all bacterial cells in a broth culture in 10 min is called
thermal death point
milk which has been pasteurized by this method has the longest shelf life
ultra high temp
