WGU D311 COMPREHENSIVE
CERTIFICATION EVALUATION VERIFIED
QUESTIONS AND FULL SOLUTIONS
●● Eukaryotic cells
Answer: Nucleus; mitochondria; chloroplast; ER; Golgi apparatus
●● light microscope
Answer: Microscope that uses light to visualize images
●● Brightfield microscope
Answer: Compound microscope with two or more lenses, produces a
dark image on bright backgrounds
●● wet mount
Answer: a slide preparation technique in which a specimen is placed on
the slide in a drop of liquid
●● Fixation
Answer: The process by which cells are killed and attached to a slide
●● basic dyes
,Answer: Chromosphere that have positive charges, attach to negatively
charged structures
●● acidic dyes
Answer: Chromosphere that are negatively charged that attaches to a
positively charged structure
●● positive stain
Answer: a stain that colors the structure of interest
●● negative stain
Answer: a simple stain that stains the background but leaves the bacteria
unstained
●● simple staining
Answer: staining a specimen with a single dye
●● Differential staining
Answer: using specific stains to distinguish different types of cell.
●● acid fast stain
Answer: A stain that differentiates cells that have waxy mycolic acid in
their gram- positive cell walls
,●● Microbiome
Answer: the microorganisms in a particular environment
●● Extremophiles
Answer: Archaea that live in extreme environments.
●● Thermophiles
Answer: Bacterium or other microorganisms that grows best at very high
temperatures; hot springs
●● Psychrophiles
Answer: Bacteria or other microorganisms that grow best as low
temperatures; snow, glaciers
●● Rizosphere
Answer: Region of soil in the vicinity of plant roots influenced by their
growth, respiration and nutrient exchange with microbes
●● Flagellum
Answer: Movement only
●● Pili
, Answer: Have substance called adhesion, stick to other bacteria; F-pills
and sex pilus-important I. The transfer of DNA between bacterial cells
●● capsule
Answer: Protection to the cell, made of polysaccharides, help bacteria
stick- producing biofilm, advantage of protecting the cell from
phagocytosis
●● cell wall
Answer: Composed of peptidoglycan, protects the cell from bursting in
hypertonic solution
●● Cell membrane
Answer: Allows substances in/waste out, keep bad substances out of cell
●● Protists
Answer: An informal grouping of eukaryotes; algae, Protozoa
●● Fungi
Answer: Eukaryotes; not photosynthetic, walls made of chitin; yeast and
molds
●● Helminths
CERTIFICATION EVALUATION VERIFIED
QUESTIONS AND FULL SOLUTIONS
●● Eukaryotic cells
Answer: Nucleus; mitochondria; chloroplast; ER; Golgi apparatus
●● light microscope
Answer: Microscope that uses light to visualize images
●● Brightfield microscope
Answer: Compound microscope with two or more lenses, produces a
dark image on bright backgrounds
●● wet mount
Answer: a slide preparation technique in which a specimen is placed on
the slide in a drop of liquid
●● Fixation
Answer: The process by which cells are killed and attached to a slide
●● basic dyes
,Answer: Chromosphere that have positive charges, attach to negatively
charged structures
●● acidic dyes
Answer: Chromosphere that are negatively charged that attaches to a
positively charged structure
●● positive stain
Answer: a stain that colors the structure of interest
●● negative stain
Answer: a simple stain that stains the background but leaves the bacteria
unstained
●● simple staining
Answer: staining a specimen with a single dye
●● Differential staining
Answer: using specific stains to distinguish different types of cell.
●● acid fast stain
Answer: A stain that differentiates cells that have waxy mycolic acid in
their gram- positive cell walls
,●● Microbiome
Answer: the microorganisms in a particular environment
●● Extremophiles
Answer: Archaea that live in extreme environments.
●● Thermophiles
Answer: Bacterium or other microorganisms that grows best at very high
temperatures; hot springs
●● Psychrophiles
Answer: Bacteria or other microorganisms that grow best as low
temperatures; snow, glaciers
●● Rizosphere
Answer: Region of soil in the vicinity of plant roots influenced by their
growth, respiration and nutrient exchange with microbes
●● Flagellum
Answer: Movement only
●● Pili
, Answer: Have substance called adhesion, stick to other bacteria; F-pills
and sex pilus-important I. The transfer of DNA between bacterial cells
●● capsule
Answer: Protection to the cell, made of polysaccharides, help bacteria
stick- producing biofilm, advantage of protecting the cell from
phagocytosis
●● cell wall
Answer: Composed of peptidoglycan, protects the cell from bursting in
hypertonic solution
●● Cell membrane
Answer: Allows substances in/waste out, keep bad substances out of cell
●● Protists
Answer: An informal grouping of eukaryotes; algae, Protozoa
●● Fungi
Answer: Eukaryotes; not photosynthetic, walls made of chitin; yeast and
molds
●● Helminths
