MCB 100 EXAM 1 PRACTICE QUESTIONS
Which one of the following types of microorganisms is characterized by having
eukaryotic type cells that lack a cell wall?
a) archaea
b) protozoa
c) mold
d) virus
e) yeast - Answers -b) protozoa
Which one of the following groups of microorganisms includes some examples that
have genomic information stored as RNA rather than DNA?
a) archaea
b) protozoa
c) mold
d) virus
e) yeast - Answers -d) virus
Who (and when) is credited with first proving that a specific disease is caused by a
specific type of bacteria?
a) Aristotle ( ca. 200 BC)
b) Girolamo Fracostoro (1546)
c) Antony Van Leeuwenhoek (1676)
d) Louis Pasteur (1861)
e) Robert Koch (1876) - Answers -e) Robert Koch
The discovery that the Archaea are a group of prokaryotic microorganisms that are
distinctly from the bacteria occurred in the ___________.
a) late 1500's
b) late 1600's
c) late 1700's
d) late 1800's
e) late 1900's - Answers -e) late 1900's
Which one of the following types of microorganism is characterized by having eukaryotic
cells, a cell wall that is composed of chitin, DOES NOT carry out photosynthesis and is
unicellular?
a) algae
b) bacteria
, c) protozoa
d) mold
e) yeast - Answers -e) yeast
Which one of the following statements about the sizes of microorganisms and the
components they are made of is false?
a) a typical virus is larger than a typical protein
b) a typical bacterium is larger than a typical virus
c) a typical bacterium is smaller than a typical eukaryotic cell
d) a typical virus is larger than a typical protozoa
e) a typical sugar molecule is smaller than a typical protein - Answers -d) a typical virus
is larger than a typical protozoa (all the rest are true)
To satisfy Koch's postulates you must:
a) be able to identify the suspected microorganism
b) be able to obtain a pure culture of the suspected microorganism
c) produce the disease of interest in an experimentally inoculated host
d) be able to detect the suspected microorganism in all patients that have the disease
e) all of the above - Answers -e) all of the above
Which of the following structures IS a feature of all cellular life forms?
a) a nucleus that is surrounded by a membrane
b) mitochondria
c) transfer RNA's (tRNA)
d) cell wall
e) endoplasmic reticulum - Answers -c) transfer RNA (tRNA)
Which of the following is NOT an organic compound?
a) water
b) propane
c) RNA
d) dextrose
e) ethyl alcohol - Answers -a) water
The chemical bond between an oxygen atom in an internal carbonyl group (ketone) is:
a) formed by the sharing of electrons between the carbon and oxygen
b) polar
c) an example of a double covalent bond
d) similar to a bond between carbon and oxygen in an aldehyde group
e) all of the above - Answers -e) all of the above
Which one of the following types of microorganisms is characterized by having
eukaryotic type cells that lack a cell wall?
a) archaea
b) protozoa
c) mold
d) virus
e) yeast - Answers -b) protozoa
Which one of the following groups of microorganisms includes some examples that
have genomic information stored as RNA rather than DNA?
a) archaea
b) protozoa
c) mold
d) virus
e) yeast - Answers -d) virus
Who (and when) is credited with first proving that a specific disease is caused by a
specific type of bacteria?
a) Aristotle ( ca. 200 BC)
b) Girolamo Fracostoro (1546)
c) Antony Van Leeuwenhoek (1676)
d) Louis Pasteur (1861)
e) Robert Koch (1876) - Answers -e) Robert Koch
The discovery that the Archaea are a group of prokaryotic microorganisms that are
distinctly from the bacteria occurred in the ___________.
a) late 1500's
b) late 1600's
c) late 1700's
d) late 1800's
e) late 1900's - Answers -e) late 1900's
Which one of the following types of microorganism is characterized by having eukaryotic
cells, a cell wall that is composed of chitin, DOES NOT carry out photosynthesis and is
unicellular?
a) algae
b) bacteria
, c) protozoa
d) mold
e) yeast - Answers -e) yeast
Which one of the following statements about the sizes of microorganisms and the
components they are made of is false?
a) a typical virus is larger than a typical protein
b) a typical bacterium is larger than a typical virus
c) a typical bacterium is smaller than a typical eukaryotic cell
d) a typical virus is larger than a typical protozoa
e) a typical sugar molecule is smaller than a typical protein - Answers -d) a typical virus
is larger than a typical protozoa (all the rest are true)
To satisfy Koch's postulates you must:
a) be able to identify the suspected microorganism
b) be able to obtain a pure culture of the suspected microorganism
c) produce the disease of interest in an experimentally inoculated host
d) be able to detect the suspected microorganism in all patients that have the disease
e) all of the above - Answers -e) all of the above
Which of the following structures IS a feature of all cellular life forms?
a) a nucleus that is surrounded by a membrane
b) mitochondria
c) transfer RNA's (tRNA)
d) cell wall
e) endoplasmic reticulum - Answers -c) transfer RNA (tRNA)
Which of the following is NOT an organic compound?
a) water
b) propane
c) RNA
d) dextrose
e) ethyl alcohol - Answers -a) water
The chemical bond between an oxygen atom in an internal carbonyl group (ketone) is:
a) formed by the sharing of electrons between the carbon and oxygen
b) polar
c) an example of a double covalent bond
d) similar to a bond between carbon and oxygen in an aldehyde group
e) all of the above - Answers -e) all of the above
