BIOD 171 MODULE 3 CERTIFICATION
SCRIPT 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ This type of microscope enhances contrast between specimen and
background but does not permit the visualization of intracellular structures..
Answer: Dark Field
◍ microbiome can provide physical barriers to pathogenic bacteria specifically
where.
Answer: -gut and skin
◍ bacterial communities on surface bones for instance were more like.
Answer: soil comminutes and had higher abundances of species like
choroflexi, chamydiae and deinococcus
◍ Identify what type of electron microscope was used to capture the following
image and explain your choice.(picture labeled A).
Answer: The above image is captured via a Transmission Electron
Microscope (TEM). Even at 20nm resolution (inset image), subcellular
substructures are still visible. The image lacks the outside 'shell' only
appearance of SEM.
◍ ____________ and _____________ may be associated with a higher
incidence and severity of gingivitis.
Answer: gram-negative anaerobes and spirochetes
◍ primary systems exposed to microbes and have established microbiomes.
Answer: -respiratory tract, urinary tract, skin, digestive tract, reproductive
tract
◍ True or False: The distinguishing characteristic of Gram-Negative bacteria
, is the presence of LPS in the outer membrane..
Answer: True
◍ cellular respiration in the presence of oxygen.
Answer: aerobic bacteria
◍ GI microbiome: variation in (2).
Answer: pH and oxygen levels
◍ high hormone levels causes what in the vaginal microbiome?.
Answer: high hormone levels= increase in glycogen = increase in diversity
of bacteria
◍ death triggers physiological changes that shape the.
Answer: microbial consortia present in, on and around the body
◍ most divers microbiome in the body.
Answer: GI microbiome
◍ You are the lead technician in the Microbiology Department's core
Microscopy lab. You are given a list what different scientists would like to
observe in their samples. You must match these samples with appropriate
type of microscopy.1. A slide stained with fuchsin simple stain to observe
the size of the cells2. The organelles in a living ciliate3. An unstained
sample that cannot be visualized with bright field because microorganism
absorbs very little light4. Theprotein trafficking of tagged proteins of
interest under experimental conditions in a cell5. Build a 3-dimensional
image of a cellA. Bright fieldB. Phase contrastC. Dark fieldD.
FlorescenceE. Confocal.
Answer: 1. A2. B3. C4. D5. E
◍ the most common phyla across the gut tube are (4).
Answer: firmicutes, Bacteroidetes, proteobacteria, and actinobacteria
◍ what type of bacteria increases in the vaginal microbiome during pregnancy.
Answer: lactobacillus
◍ second most diverse microbiome in the body.
SCRIPT 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ This type of microscope enhances contrast between specimen and
background but does not permit the visualization of intracellular structures..
Answer: Dark Field
◍ microbiome can provide physical barriers to pathogenic bacteria specifically
where.
Answer: -gut and skin
◍ bacterial communities on surface bones for instance were more like.
Answer: soil comminutes and had higher abundances of species like
choroflexi, chamydiae and deinococcus
◍ Identify what type of electron microscope was used to capture the following
image and explain your choice.(picture labeled A).
Answer: The above image is captured via a Transmission Electron
Microscope (TEM). Even at 20nm resolution (inset image), subcellular
substructures are still visible. The image lacks the outside 'shell' only
appearance of SEM.
◍ ____________ and _____________ may be associated with a higher
incidence and severity of gingivitis.
Answer: gram-negative anaerobes and spirochetes
◍ primary systems exposed to microbes and have established microbiomes.
Answer: -respiratory tract, urinary tract, skin, digestive tract, reproductive
tract
◍ True or False: The distinguishing characteristic of Gram-Negative bacteria
, is the presence of LPS in the outer membrane..
Answer: True
◍ cellular respiration in the presence of oxygen.
Answer: aerobic bacteria
◍ GI microbiome: variation in (2).
Answer: pH and oxygen levels
◍ high hormone levels causes what in the vaginal microbiome?.
Answer: high hormone levels= increase in glycogen = increase in diversity
of bacteria
◍ death triggers physiological changes that shape the.
Answer: microbial consortia present in, on and around the body
◍ most divers microbiome in the body.
Answer: GI microbiome
◍ You are the lead technician in the Microbiology Department's core
Microscopy lab. You are given a list what different scientists would like to
observe in their samples. You must match these samples with appropriate
type of microscopy.1. A slide stained with fuchsin simple stain to observe
the size of the cells2. The organelles in a living ciliate3. An unstained
sample that cannot be visualized with bright field because microorganism
absorbs very little light4. Theprotein trafficking of tagged proteins of
interest under experimental conditions in a cell5. Build a 3-dimensional
image of a cellA. Bright fieldB. Phase contrastC. Dark fieldD.
FlorescenceE. Confocal.
Answer: 1. A2. B3. C4. D5. E
◍ the most common phyla across the gut tube are (4).
Answer: firmicutes, Bacteroidetes, proteobacteria, and actinobacteria
◍ what type of bacteria increases in the vaginal microbiome during pregnancy.
Answer: lactobacillus
◍ second most diverse microbiome in the body.
