BIOL 2320: Microbiology Exam 2 A
Test Questions With 100% Solved
Solutions.
A microorganism grows in the lab on medium containing mineral salts but no organic
compounds. The organism is likely to be a(n) - Answer Autotroph
A(n)______ organism require(s) oxygen for growth. - Answer obligate aerobic
human pathogens are classified as - Answer mesophiles
which of the following organisms would be most likely to contaminate a jar of pickles - Answer
an acidophile
A fastidious organism might be grown on which of the following types of media - Answer
enriched media
Joan wants to discover a microbe capable of degrading an environmental contaminant. Which
of the following culturing methods would be most effective for isolation of such an organism. -
Answer enrichment culture
The events of binary fission are - Answer 1.DNA is replicated
2. cell doubles in size
3. Cell forms a septum
4.Cell separates from its offspring
MacConkey agar plates represent ________ medium. - Answer both a differential and a
selective
The_______ of a population is the time it takes for the cells to double in number. - Answer
generation time
The use of salt and sugar in preserving various types of foods is an application of which of the
following concepts? - Answer osmotic pressure
A clinical sample labeled as "sputum" was collected from - Answer tissue
, The method of obtaining isolated cultures that utilizes surface area to physically dilute
specimens is called - Answer the streak-plate technique
Blood agar plates are an example of ________ medium. - Answer differential
Creating conditions in the laboratory that promote the growth of some microbes while
inhibiting the growth of others is called - Answer selective enrichment culturing
a microorganism found living under conditions of high_____ is a barophile - Answer
hydrostatic pressure
nucleic acid structure are - Answer polymers of nucleotides
the bacterial chromosome is - Answer both circular and found in a nucleoid
Translation involves - Answer switching from the nucleotide "language" to the amino acid
"language"
mRNA, tRNA, rRNA
semiconservative DNA replication means that - Answer Each daughter DNA molecule is
composed of one original strand and one new strand
That each daughter DNA strand contains one strand from the parent and one that is newly
synthesized.
Which of the following processes is involved in the "central dogma" of genetics - Answer
transcription and translation
DNA damage caused by nitrous acid results in________mutations. - Answer substitution
The Ames test demonstrates that a chemical is - Answer mutagenic in Salmonella.
The horizontal transfer process known as transduction - Answer involves a virus
Frederick Griffith discovered - Answer transformation
Test Questions With 100% Solved
Solutions.
A microorganism grows in the lab on medium containing mineral salts but no organic
compounds. The organism is likely to be a(n) - Answer Autotroph
A(n)______ organism require(s) oxygen for growth. - Answer obligate aerobic
human pathogens are classified as - Answer mesophiles
which of the following organisms would be most likely to contaminate a jar of pickles - Answer
an acidophile
A fastidious organism might be grown on which of the following types of media - Answer
enriched media
Joan wants to discover a microbe capable of degrading an environmental contaminant. Which
of the following culturing methods would be most effective for isolation of such an organism. -
Answer enrichment culture
The events of binary fission are - Answer 1.DNA is replicated
2. cell doubles in size
3. Cell forms a septum
4.Cell separates from its offspring
MacConkey agar plates represent ________ medium. - Answer both a differential and a
selective
The_______ of a population is the time it takes for the cells to double in number. - Answer
generation time
The use of salt and sugar in preserving various types of foods is an application of which of the
following concepts? - Answer osmotic pressure
A clinical sample labeled as "sputum" was collected from - Answer tissue
, The method of obtaining isolated cultures that utilizes surface area to physically dilute
specimens is called - Answer the streak-plate technique
Blood agar plates are an example of ________ medium. - Answer differential
Creating conditions in the laboratory that promote the growth of some microbes while
inhibiting the growth of others is called - Answer selective enrichment culturing
a microorganism found living under conditions of high_____ is a barophile - Answer
hydrostatic pressure
nucleic acid structure are - Answer polymers of nucleotides
the bacterial chromosome is - Answer both circular and found in a nucleoid
Translation involves - Answer switching from the nucleotide "language" to the amino acid
"language"
mRNA, tRNA, rRNA
semiconservative DNA replication means that - Answer Each daughter DNA molecule is
composed of one original strand and one new strand
That each daughter DNA strand contains one strand from the parent and one that is newly
synthesized.
Which of the following processes is involved in the "central dogma" of genetics - Answer
transcription and translation
DNA damage caused by nitrous acid results in________mutations. - Answer substitution
The Ames test demonstrates that a chemical is - Answer mutagenic in Salmonella.
The horizontal transfer process known as transduction - Answer involves a virus
Frederick Griffith discovered - Answer transformation
