Question: The production of antibiotics by the fungus Penicillium chrysogenum is considered which type of symbiotic relationship? Mutualism Commensalism Amensalism Parasitism

The production of antibiotics by the fungus Penicillium chrysogenum is considered which type of symbiotic relationship? Mutualism Commensalism Amensalism Parasitism Correct Answer: Mutualism

 

Question: Pelagibacter ubique is an organism that thrives in low-nutrient environments. The correct term used to describe an organism like this is: Copiotroph Oligotroph Photoautotroph Chemoheterotroph

Pelagibacter ubique is an organism that thrives in low-nutrient environments. The correct term used to describe an organism like this is: Copiotroph Oligotroph Photoautotroph Chemoheterotroph Correct Answer: Oligotroph

 

Question: Members of the genus Vibrio belong to the class ________ and are usually found in ________ environments. Alphaproteobacteria/soil Alphaproteobacteria/marine Gammaproteobacteria/soil Gammaproteobacteria/marine

Members of the genus Vibrio belong to the class ________ and are usually found in ________ environments. Alphaproteobacteria/soil Alphaproteobacteria/marine Gammaproteobacteria/soil Gammaproteobacteria/marine Correct Answer: Gammaproteobacteria/marine

 

Question: Which organelle is embedded in the rough endoplasmic reticulum to give it its characteristic “bumpy” appearance? Ribosomes Nucleus Golgi bodies Mitochondria

Which organelle is embedded in the rough endoplasmic reticulum to give it its characteristic “bumpy” appearance? Ribosomes Nucleus Golgi bodies Mitochondria Correct Answer: Ribosomes

 

Question: Pseudogymnoascus destructans is the ________ that causes ________ in bats. Ciliate/White Nose Syndrome Fungus/White Nose Syndrome Ciliate/African Sleeping Sickness Fungus/African Sleeping Sickness

Pseudogymnoascus destructans is the ________ that causes ________ in bats. Ciliate/White Nose Syndrome Fungus/White Nose Syndrome Ciliate/African Sleeping Sickness Fungus/African Sleeping Sickness Correct Answer: Fungus/White Nose Syndrome

 

Question: Which type of eukaryotic microbe has two sets of nuclei, one for general cell function and one for sexual reproduction? Fungi Kinetoplastids Apicomplexans Ciliates Stramenopiles

Which type of eukaryotic microbe has two sets of nuclei, one for general cell function and one for sexual reproduction? Fungi Kinetoplastids Apicomplexans Ciliates Stramenopiles Correct Answer: Ciliates

 

Question: Which group of Amoebozoans contains parasites of humans that can cause neurological disease with high mortality? Slime molds Gymnamoebae Entamoeba

Which group of Amoebozoans contains parasites of humans that can cause neurological disease with high mortality? Slime molds Gymnamoebae Entamoeba Correct Answer: Entamoeba

 

Question: True or False: A lytic phage requires an environmental signal before exiting the host genome and release new phage into the environment. True False

True or False: A lytic phage requires an environmental signal before exiting the host genome and release new phage into the environment. True False Correct Answer: False

 

Question: Mannitol salt agar (MSA) is an example of a medium that is: Selective Differential Both

Mannitol salt agar (MSA) is an example of a medium that is: Selective Differential Both Correct Answer: Both

 

Question: True or False: A benefit of complex media is that we know the exact proportion of all chemical ingredients used. True False

True or False: A benefit of complex media is that we know the exact proportion of all chemical ingredients used. True False Correct Answer: False

 

Question: During which phase of the bacterial growth curve are you most likely to observe an equal proportion of live and dead cells, leaving the population in a steady state? Lag Phase Exponential Phase Stationary Phase Death Phase

During which phase of the bacterial growth curve are you most likely to observe an equal proportion of live and dead cells, leaving the population in a steady state? Lag Phase Exponential Phase Stationary Phase Death Phase Correct Answer: Stationary Phase

 

Question: During which phase of the bacterial growth curve is the population growing slowly due to an “adjustment” to the new environment? Lag Phase Exponential Phase

During which phase of the bacterial growth curve is the population growing slowly due to an “adjustment” to the new environment? Lag Phase Exponential Phase Correct Answer: Lag Phase

 

Question: During which phase of the bacterial growth curve is it most accurate to calculate generation time for a bacterial culture? Lag Phase Exponential Phase Stationary Phase Death Phase

During which phase of the bacterial growth curve is it most accurate to calculate generation time for a bacterial culture? Lag Phase Exponential Phase Stationary Phase Death Phase Correct Answer: Exponential Phase

 

Question: You are a new member of the Micro Lab prep staff. In order to set up the best media making assignments for the semester, Professor Walters sets up a simple test: You must calculate the number of cells that grow in a bacterial culture over the course of a 10 hour incubation period. Here’s what you know:

You are a new member of the Micro Lab prep staff. In order to set up the best media making assignments for the semester, Professor Walters sets up a simple test: You must calculate the number of cells that grow in a bacterial culture over the course of a 10 hour incubation period. Here’s what you know: The culture was started with 27 cells. The generation time of this organism is 60 minutes. The incubation period is 10 hours. What is the total number of cells in the culture at the end of the 10 hour incubation period? 27,000 cells 27,648 cells 16,000 cells 32,768 cells Correct Answer: 27,648 cells

 

Question: The correct units when calculating original cell density (OCD) are: nm CFU/mL cells/mL OCD/mL

The correct units when calculating original cell density (OCD) are: nm CFU/mL cells/mL OCD/mL Correct Answer: CFU/mL

 

Question: Why is it more accurate to use the plate count method over turbidity to measure cell density in a bacterial culture? It takes more time. Plate counts incorporate both live AND dead cells. Turbidity incorporates both live AND dead cells. It takes less time.

Why is it more accurate to use the plate count method over turbidity to measure cell density in a bacterial culture? It takes more time. Plate counts incorporate both live AND dead cells. Turbidity incorporates both live AND dead cells. It takes less time. Correct Answer: Plate counts incorporate both live AND dead cells.

 

Question: Endogenous infections arise from microbes that are: In the patient’s own microbiome In the hospital environment In the community Transmitted from one person to another

Endogenous infections arise from microbes that are: In the patient’s own microbiome In the hospital environment In the community Transmitted from one person to another Correct Answer: In the patient’s own microbiome

 

Question: Bacteria of the genus Bifidobacterium are prevalent in: The small intestines of adults The GI tract of breastfed infants The GI tract of non-breastfed infants

Bacteria of the genus Bifidobacterium are prevalent in: The small intestines of adults The GI tract of breastfed infants The GI tract of non-breastfed infants Correct Answer: The GI tract of breastfed infants

 

Question: Lysozyme and the antibiotic penicillin have similar mechanisms of action in that they both cause damage to the bacterial ___. Cell membrane Capsule Cell wall Ribosomes DNA

Lysozyme and the antibiotic penicillin have similar mechanisms of action in that they both cause damage to the bacterial ___. Cell membrane Capsule Cell wall Ribosomes DNA Correct Answer: Cell wall