UNE MICROBIOLOGY FINAL QUESTIONS AND
CORRECT ANSWERS
Nitrogen is a growth Limiting nutrient for many organisms because - Answers - 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 - Answers - Salt concentrations
What tests are used to help identify bacteria today? - Answers - All of the above
all of the following are used to protect organisms from the toxic by products of oxygen
EXCEPT - Answers - protease
A metabolic pathway - Answers - 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? - Answers - Small hydrophobic
Molecules
The molecule that an enzyme acts upon is know as its - Answers - substrate
any process hat releases energy is referred to as _ process - Answers - exergonic
__ are complex communities of various types of microbes that adhere to surfaces -
Answers - biofilm
In 854, John Snow determined that contaminated water transmits - Answers - Cholera
Koch's postulates provided guidelines for - Answers - relating certain microorganisms
with certain diseases
The place on the enzyme where the enzyme interacts with the substrate is called the -
Answers - active site
Lipid A is also known as - Answers - endotoxin
At temperatures higher than the maximum growth temperature for an organism -
Answers - 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 - Answers -
facultative anerobe
,During which growth phase are bacteria more susceptible to antimicrobial drugs -
Answers - Log phase
Anabolic reactions may be characterized as - Answers - forming large molecules from
smaller molecules
heat is used in the destruction of bacteria because heat - Answers - denatures enzymes
by altering their tertiary structure
which of the following prokaryotic cells contain an outer membrane - Answers - gram-
negative bacteria
The study of the occurrence, distribution, and spread of disease is known as - Answers
- epidemiology
which of the following was NOT an aspect of Pasteur's experiments to disprove
spontaneous generation - Answers - 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 - Answers - 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 - Answers - Obligate aerobic
which of the following statements concerning the characteristics of life is FALSE -
Answers - 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 - Answers - Quorum Sensing
The study of the body's defenses against pathogens is called - Answers - Immunology
Which of the following measurement techniques would be useful to quantify a species of
bacteria that is difficult to culture? - Answers - Microscope counts
The Krebs cycle accounts for all of the following EXCEPT - Answers - production of
pyruvate from glucose
The term barophile refers to which of the following growth requirements - Answers -
hydrostatic pressure
which of the following is TRUE statement concerning the structure and function of
enzymes - Answers - After an enzyme has catalyzed a reaction, it resumes its original
shape and can interact with a new substrate molecule
, Anabolism - Answers - Synthesis of cellular compounds, Photosynthetic reactions that
produce glucose
Catabolism - Answers - Digestion of cellular compounds, Cells fed glucose and yielding
energy by fermentation and respiration, involves the krebs cycle, starch used for cellular
energy, involves glycolysis
Anabolism and Catabolism both - Answers - Total of biochemical processes in a cell ,
the metabolism of chemoheterotrophs
T/F resolution fo the spontaneous generation debate occurred with Koch's use of swan-
necked flasks - Answers - Falses
T/F Refrigeration temperatures are too cold for the growth of microorganisms - Answers
- False
T/F the bacterial chromosome is continuos loop of DNA suspended in the cytosol
without a nuclear membrane - Answers - True
T/F Environmental changes can result in the inactivation of enzymes - Answers - TRUE
T/F Fermentation pathways provide a cell with an alternative wat to regenerate NAD+
for glycoloysis - Answers - True
T/F Obligate anerobes have enzymes such as superoxide dismutase to protect them
from the damaging effects of oxygen - Answers - False
T/F A selective medium can be formulated either by including inhibitory chemical
substances or by leaving out a single crucial nutrient - Answers - True
T/F an obligate halophile will burst if placed in freshwater - Answers - True
T/F Christian Gram devised a staining technique that divides all bacteria into 2 groups -
Answers - Ture
T/F Glucose is used as an energy source only when proteins are fats are not available -
Answers - False
Microbes that cause infectious disease are called - Answers - pathogens
a _ is a mass of cells that are descended from a single cell through successive cell
divisions - Answers - colony
enzymes increase the rate of reaction by lowering the _ energy - Answers - activation
CORRECT ANSWERS
Nitrogen is a growth Limiting nutrient for many organisms because - Answers - 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 - Answers - Salt concentrations
What tests are used to help identify bacteria today? - Answers - All of the above
all of the following are used to protect organisms from the toxic by products of oxygen
EXCEPT - Answers - protease
A metabolic pathway - Answers - 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? - Answers - Small hydrophobic
Molecules
The molecule that an enzyme acts upon is know as its - Answers - substrate
any process hat releases energy is referred to as _ process - Answers - exergonic
__ are complex communities of various types of microbes that adhere to surfaces -
Answers - biofilm
In 854, John Snow determined that contaminated water transmits - Answers - Cholera
Koch's postulates provided guidelines for - Answers - relating certain microorganisms
with certain diseases
The place on the enzyme where the enzyme interacts with the substrate is called the -
Answers - active site
Lipid A is also known as - Answers - endotoxin
At temperatures higher than the maximum growth temperature for an organism -
Answers - 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 - Answers -
facultative anerobe
,During which growth phase are bacteria more susceptible to antimicrobial drugs -
Answers - Log phase
Anabolic reactions may be characterized as - Answers - forming large molecules from
smaller molecules
heat is used in the destruction of bacteria because heat - Answers - denatures enzymes
by altering their tertiary structure
which of the following prokaryotic cells contain an outer membrane - Answers - gram-
negative bacteria
The study of the occurrence, distribution, and spread of disease is known as - Answers
- epidemiology
which of the following was NOT an aspect of Pasteur's experiments to disprove
spontaneous generation - Answers - 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 - Answers - 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 - Answers - Obligate aerobic
which of the following statements concerning the characteristics of life is FALSE -
Answers - 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 - Answers - Quorum Sensing
The study of the body's defenses against pathogens is called - Answers - Immunology
Which of the following measurement techniques would be useful to quantify a species of
bacteria that is difficult to culture? - Answers - Microscope counts
The Krebs cycle accounts for all of the following EXCEPT - Answers - production of
pyruvate from glucose
The term barophile refers to which of the following growth requirements - Answers -
hydrostatic pressure
which of the following is TRUE statement concerning the structure and function of
enzymes - Answers - After an enzyme has catalyzed a reaction, it resumes its original
shape and can interact with a new substrate molecule
, Anabolism - Answers - Synthesis of cellular compounds, Photosynthetic reactions that
produce glucose
Catabolism - Answers - Digestion of cellular compounds, Cells fed glucose and yielding
energy by fermentation and respiration, involves the krebs cycle, starch used for cellular
energy, involves glycolysis
Anabolism and Catabolism both - Answers - Total of biochemical processes in a cell ,
the metabolism of chemoheterotrophs
T/F resolution fo the spontaneous generation debate occurred with Koch's use of swan-
necked flasks - Answers - Falses
T/F Refrigeration temperatures are too cold for the growth of microorganisms - Answers
- False
T/F the bacterial chromosome is continuos loop of DNA suspended in the cytosol
without a nuclear membrane - Answers - True
T/F Environmental changes can result in the inactivation of enzymes - Answers - TRUE
T/F Fermentation pathways provide a cell with an alternative wat to regenerate NAD+
for glycoloysis - Answers - True
T/F Obligate anerobes have enzymes such as superoxide dismutase to protect them
from the damaging effects of oxygen - Answers - False
T/F A selective medium can be formulated either by including inhibitory chemical
substances or by leaving out a single crucial nutrient - Answers - True
T/F an obligate halophile will burst if placed in freshwater - Answers - True
T/F Christian Gram devised a staining technique that divides all bacteria into 2 groups -
Answers - Ture
T/F Glucose is used as an energy source only when proteins are fats are not available -
Answers - False
Microbes that cause infectious disease are called - Answers - pathogens
a _ is a mass of cells that are descended from a single cell through successive cell
divisions - Answers - colony
enzymes increase the rate of reaction by lowering the _ energy - Answers - activation
