UNE Microbiology Exam #1 Questions with Correct Answers
Nitrogen is a growth Limiting nutrient for many organisms because - ✔✔only a
few microbes can extract it from the atmosphere, but all organisms require if for
amino acid and nucleotide synthesis
An organism that tolerates high _ is called a halophile - ✔✔Salt concentrations
What tests are used to help identify bacteria today? - ✔✔All of the above
all of the following are used to protect organisms from the toxic by products of
oxygen EXCEPT - ✔✔protease
A metabolic pathway - ✔✔All the above are true
which of the following molecules would be expected to cross the cytoplasmic
membrane rapidly and without the use of transport proteins? - ✔✔Small
hydrophobic Molecules
The molecule that an enzyme acts upon is know as its - ✔✔substrate
any process hat releases energy is referred to as _ process - ✔✔exergonic
__ are complex communities of various types of microbes that adhere to surfaces
- ✔✔biofilm
,In 854, John Snow determined that contaminated water transmits - ✔✔Cholera
Koch's postulates provided guidelines for - ✔✔relating certain microorganisms
with certain diseases
The place on the enzyme where the enzyme interacts with the substrate is called
the - ✔✔active site
Lipid A is also known as - ✔✔endotoxin
At temperatures higher than the maximum growth temperature for an organism -
✔✔hydrogen bonds are broken, proteins are denatured, and membranes become
too fluid
Microbes that can live in the presence or absence of oxygen are called -
✔✔facultative anerobe
During which growth phase are bacteria more susceptible to antimicrobial drugs -
✔✔Log phase
Anabolic reactions may be characterized as - ✔✔forming large molecules from
smaller molecules
heat is used in the destruction of bacteria because heat - ✔✔denatures enzymes
by altering their tertiary structure
, which of the following prokaryotic cells contain an outer membrane - ✔✔gram-
negative bacteria
The study of the occurrence, distribution, and spread of disease is known as -
✔✔epidemiology
which of the following was NOT an aspect of Pasteur's experiments to disprove
spontaneous generation - ✔✔The flasks he used were sealed with corks
Leeuwenhoek made lenses that allowed him to magnify objects more than 200x.
however, he failed to promote scientific inquiry because - ✔✔He didnt reveal
how to grind the lenses and no one else was doing it that well
An __ organism is one that requires oxygen for growth - ✔✔Obligate aerobic
which of the following statements concerning the characteristics of life is FALSE -
✔✔Reproduction is defined as an increase in the size of an organism
__ involves the ability of bacterial cells to sense their numbers by producing and
responding to extracellular chemicals - ✔✔Quorum Sensing
The study of the body's defenses against pathogens is called - ✔✔Immunology
Which of the following measurement techniques would be useful to quantify a
species of bacteria that is difficult to culture? - ✔✔Microscope counts
Nitrogen is a growth Limiting nutrient for many organisms because - ✔✔only a
few microbes can extract it from the atmosphere, but all organisms require if for
amino acid and nucleotide synthesis
An organism that tolerates high _ is called a halophile - ✔✔Salt concentrations
What tests are used to help identify bacteria today? - ✔✔All of the above
all of the following are used to protect organisms from the toxic by products of
oxygen EXCEPT - ✔✔protease
A metabolic pathway - ✔✔All the above are true
which of the following molecules would be expected to cross the cytoplasmic
membrane rapidly and without the use of transport proteins? - ✔✔Small
hydrophobic Molecules
The molecule that an enzyme acts upon is know as its - ✔✔substrate
any process hat releases energy is referred to as _ process - ✔✔exergonic
__ are complex communities of various types of microbes that adhere to surfaces
- ✔✔biofilm
,In 854, John Snow determined that contaminated water transmits - ✔✔Cholera
Koch's postulates provided guidelines for - ✔✔relating certain microorganisms
with certain diseases
The place on the enzyme where the enzyme interacts with the substrate is called
the - ✔✔active site
Lipid A is also known as - ✔✔endotoxin
At temperatures higher than the maximum growth temperature for an organism -
✔✔hydrogen bonds are broken, proteins are denatured, and membranes become
too fluid
Microbes that can live in the presence or absence of oxygen are called -
✔✔facultative anerobe
During which growth phase are bacteria more susceptible to antimicrobial drugs -
✔✔Log phase
Anabolic reactions may be characterized as - ✔✔forming large molecules from
smaller molecules
heat is used in the destruction of bacteria because heat - ✔✔denatures enzymes
by altering their tertiary structure
, which of the following prokaryotic cells contain an outer membrane - ✔✔gram-
negative bacteria
The study of the occurrence, distribution, and spread of disease is known as -
✔✔epidemiology
which of the following was NOT an aspect of Pasteur's experiments to disprove
spontaneous generation - ✔✔The flasks he used were sealed with corks
Leeuwenhoek made lenses that allowed him to magnify objects more than 200x.
however, he failed to promote scientific inquiry because - ✔✔He didnt reveal
how to grind the lenses and no one else was doing it that well
An __ organism is one that requires oxygen for growth - ✔✔Obligate aerobic
which of the following statements concerning the characteristics of life is FALSE -
✔✔Reproduction is defined as an increase in the size of an organism
__ involves the ability of bacterial cells to sense their numbers by producing and
responding to extracellular chemicals - ✔✔Quorum Sensing
The study of the body's defenses against pathogens is called - ✔✔Immunology
Which of the following measurement techniques would be useful to quantify a
species of bacteria that is difficult to culture? - ✔✔Microscope counts
