M2 SM Flashcards
True or False
DNA replication produces three new strands of DNA, each having a base sequence complementary to the original strands.
-False (2 strands)
Growth rate is constant, whereby there is a steady state of multiplication.
a. Lag phase
b. Log phase
c. Stationary phase
d. Decline
b. Log phase
True or False
Bacteria that are unable to synthesize their own metabolites are called heterotrophs.
-true
Which of the following involves bacteriophages?
a. Bacterial Transformation
b. Bacterial Transduction
c. Bacterial Conjugation
d. All of the above
b. Bacterial Transduction
Match the letters according to the picture given below to the phases of the bacterial growth curve.
A
B
C
D
A - Lag
B - Logarithmic
C - Stationary
D - Decline
True or False
Facultative anaerobes may even die upon exposure to oxygen
-False (can survive w/ or w/out oxygen)
Genes are the sequence of ____
-Nucleotides
The bacterial organelle that allows conjugation
a. DNA
b. Plasmid
c. Pili
d. Cilia
c. Pili
Bacteria that grows at 4DegC
a. Mycobacterium thermosusceptible
b. Listeria monocytogenes
c. Staphylococcus aureus
d. Yersinia pseudotuberculosis
-Listeria monocytogenes
The equipment able to mimic body temperature used in the laboratory
a. Incubator
b. Scintillator
c. Autoclave
d. Oven
a. Incubator
The average length of bacteria of medical importance is _____ um
-3-5
True or False
Majority of pathogenic bacteria grow best at neutral or slightly alkaline pH (7.2 – 7.6).
-True
True or False
Transcription is the process in which the information in a sequence of mRNA is used to dictate the amino acid sequence of a protein.
-False
The lowest temperature that kills a bacterium under a standard condition
-Thermal death point
Bacteriodes is an example of _____ bacteria based on oxygen requirement
-Obligate anaerobes
0.045mm is equivalent to _____um (write the number only)
-45
Which of the following enzymes proofreads DNA and removes mismatched bases?
a. DNA helicase
b. DNA polymerase
c. DNA ligase
d. RNA polymerase
-DNA polymerase
True or False
Microaerophilic bacteria grow best in environments where there is a presence of low oxygen tension.
-True
Phase where in bacteria are preparing for reproduction and where macromolecules are synthesized
a. Lag phase
b. Log phase
c. Stationary phase
d. Decline
a. Lag phase
Thermophilic bacteria are those that grow best at temperatures below 20C. the lowest temperature that kills a bacterium under standard conditions in a given time is known as thermal death point.
a. First statement is false, second statement is true
b. Both statements are true
c. Both statements are false
d. First statement is true, second statement is
false
-First statement is false, second statement is true.
These microorganisms only grow in the presence of oxygen
a. Facultative Anaerobes
b. Obligate Aerobes
c. Facultative Aerobes
d. Obligate Anaerobes
d. Obligate Anaerobes
True or False
Transcription is the process in which the information in a sequence of RNA is used to dictate the amino acid sequence of a protein.
-False (Translation)
Which of the following involves transfer of DNA from a living donor bacterium to a living recipient bacterium by cell-to-cell contact?
a. Bacterial Transformation
b. Bacterial Transduction
c. Bacterial Conjugation
d. All of the above
c. Bacterial Conjugation
Mesophilic bacteria grow best at which temperature? a. below 20°C
b. 25-40°C
c. 55-80°C
d. None of the above
b. 25-40°C
