BIMM 120 Midterm 1 questions n
answers rated A+
microbe - correct answer ✔✔ anything too small to see with the unaided human eye
3 domains of life - correct answer ✔✔ Bacteria, Archaea, Eukarya
4 main parts of bacteria - correct answer ✔✔ cytoplasm. chromosome, plasma membrane, and
cell wall
mycorrhizae - correct answer ✔✔ the most important symbiosis on the planet; most plants
need this fungi to facilitate uptake of minerals and water from the soil; most important for
seeking out tiny pockets of phosphate in the soil and increasing the surface area of the plant
root
dry mount - correct answer ✔✔ place specimen in center of the slide and place a cover slop
over the sample (hair, feathers, pollen)
wet mount - correct answer ✔✔ suspend specimen in water and place a cover slip over the
sample (viewing living microbes)
stain mount - correct answer ✔✔ stain specimen and allow it to air dry, do not place a over slop
(viewing dead microbes)
transmission electron microscope - correct answer ✔✔ examine cells and structures at very
high magnification; can view microbes at the molecular level; thin sections of the cell are
needed
,scanning electron microscope - correct answer ✔✔ examine the 3D structure of a cell; cells are
coated with heavy metal (golf)
wet mount; light microscopy - correct answer ✔✔ if we want to view a live microbe, what type
of mount would we make, what type of microscopy would e use?
staining - correct answer ✔✔ dyes including methylene blue, crystal violet, and safranin;
positively charged allowing them to bind to negatively charged cell components
culture media - correct answer ✔✔ a nutrient solution tailored to the particular organism;
contains agar and nutrients that are heat sterilized, and poured into a plate; most important
nutrients for growth are C and N
culture - correct answer ✔✔ to enable microbes to propagate on a plate, a collection of cells
that have been grown in or on a nutrient medium
growth - correct answer ✔✔ an increase in cell number
colony - correct answer ✔✔ a single cell that divides into millions of cells
punitive theory - correct answer ✔✔ diseases were a punishment from God
miasma theory - correct answer ✔✔ diseases (cholera, chlamydia, Black death) were caused by
a miasma or "bad air"
germ theory - correct answer ✔✔ diseases are caused by the presence and actions of specific
microorganisms within the body (replacing the miasma theory)
, Koch's 4 postulates - correct answer ✔✔ 1. suspected causative agent must be absent from all
healthy organisms but present in all diseased organisms
2. the causative agent must be isolated from the diseased organism and grown in pure culture
3. cultured agent must cause the same disease when inoculated into a healthy, susceptible
organism
4. same causative agent must then be reisolated from the inoculated, diseased organism
coccus - correct answer ✔✔ spherical bacterial morphology
bacillus - correct answer ✔✔ rod-shaped, cylindrical bacterial morphology
spirilla - correct answer ✔✔ curved, spinal bacterial morphology
cytoplasmic membrane - correct answer ✔✔ a membrane that surrounds the cytoplasm of the
cell
selective permeability - correct answer ✔✔ movement of nutrients into the cell and waste out
of the cell. anchors several proteins and plays a role in energy conservation
phospholipid bilayer - correct answer ✔✔ contains embedded proteins, composed of
phospholipids that contain hydrophobic tails and hydrophilic heads
hydrophobic - correct answer ✔✔ Water fearing
transport proteins - correct answer ✔✔ cytoplasmic membrane is so impermeable (due to its
polarity) that these are needed to move solutes across it
answers rated A+
microbe - correct answer ✔✔ anything too small to see with the unaided human eye
3 domains of life - correct answer ✔✔ Bacteria, Archaea, Eukarya
4 main parts of bacteria - correct answer ✔✔ cytoplasm. chromosome, plasma membrane, and
cell wall
mycorrhizae - correct answer ✔✔ the most important symbiosis on the planet; most plants
need this fungi to facilitate uptake of minerals and water from the soil; most important for
seeking out tiny pockets of phosphate in the soil and increasing the surface area of the plant
root
dry mount - correct answer ✔✔ place specimen in center of the slide and place a cover slop
over the sample (hair, feathers, pollen)
wet mount - correct answer ✔✔ suspend specimen in water and place a cover slip over the
sample (viewing living microbes)
stain mount - correct answer ✔✔ stain specimen and allow it to air dry, do not place a over slop
(viewing dead microbes)
transmission electron microscope - correct answer ✔✔ examine cells and structures at very
high magnification; can view microbes at the molecular level; thin sections of the cell are
needed
,scanning electron microscope - correct answer ✔✔ examine the 3D structure of a cell; cells are
coated with heavy metal (golf)
wet mount; light microscopy - correct answer ✔✔ if we want to view a live microbe, what type
of mount would we make, what type of microscopy would e use?
staining - correct answer ✔✔ dyes including methylene blue, crystal violet, and safranin;
positively charged allowing them to bind to negatively charged cell components
culture media - correct answer ✔✔ a nutrient solution tailored to the particular organism;
contains agar and nutrients that are heat sterilized, and poured into a plate; most important
nutrients for growth are C and N
culture - correct answer ✔✔ to enable microbes to propagate on a plate, a collection of cells
that have been grown in or on a nutrient medium
growth - correct answer ✔✔ an increase in cell number
colony - correct answer ✔✔ a single cell that divides into millions of cells
punitive theory - correct answer ✔✔ diseases were a punishment from God
miasma theory - correct answer ✔✔ diseases (cholera, chlamydia, Black death) were caused by
a miasma or "bad air"
germ theory - correct answer ✔✔ diseases are caused by the presence and actions of specific
microorganisms within the body (replacing the miasma theory)
, Koch's 4 postulates - correct answer ✔✔ 1. suspected causative agent must be absent from all
healthy organisms but present in all diseased organisms
2. the causative agent must be isolated from the diseased organism and grown in pure culture
3. cultured agent must cause the same disease when inoculated into a healthy, susceptible
organism
4. same causative agent must then be reisolated from the inoculated, diseased organism
coccus - correct answer ✔✔ spherical bacterial morphology
bacillus - correct answer ✔✔ rod-shaped, cylindrical bacterial morphology
spirilla - correct answer ✔✔ curved, spinal bacterial morphology
cytoplasmic membrane - correct answer ✔✔ a membrane that surrounds the cytoplasm of the
cell
selective permeability - correct answer ✔✔ movement of nutrients into the cell and waste out
of the cell. anchors several proteins and plays a role in energy conservation
phospholipid bilayer - correct answer ✔✔ contains embedded proteins, composed of
phospholipids that contain hydrophobic tails and hydrophilic heads
hydrophobic - correct answer ✔✔ Water fearing
transport proteins - correct answer ✔✔ cytoplasmic membrane is so impermeable (due to its
polarity) that these are needed to move solutes across it
