BIOL 2030: Exam 1 | 2026/2027 | Correct Answers |
Questions With Complete Solutions
19 The characteristics of carbohydrates include:
a. monosaccharides serve as the building blocks for these
polymers
b. monosaccharides are joined together by covalent bonds
known as glycosidic links
c. monosaccharides are joined by hydrolytic reactions
d. only a and b are correct Correct Answers d. only a and b are
correct
Bacterial flagella work like a small outboard engine on a small
boat to move the bacterium. This movement includes:
a. chemotaxis
b. runs and tumbles
c. clockwise and counter-clockwise movement
d. all of these Correct Answers d. all of these
Cytoplasm is an often-overlooked feature of internal portion of
bacterial cell. Its unique features include:
a. viscous gel-like solution that slows rate of diffusion within
cells
b. mixture of soluble ions, metabolites and macromolecules
c. water that holds water-soluble chemicals
d. all of these are correct Correct Answers d. all of these are
correct
Differential staining requires:
a. preparation of a smear
b application of 2 or more different positive stains
,c. decolorizing chemical
d. all of these are correct Correct Answers d. all of these are
correct
DNA may be described as ________.
a. a macromolecule made up of monomers called nucleotides
b. the hereditary material of cells that is passed one generation to
the next
c. a double helix composed of small packets of information
called genes
d. all of these are correct Correct Answers d. all of these are
correct
Endospores are all of the following EXCEPT:
a. heat and chemical resistant
b. survive after being frozen for 10,000 years
c survive after fossilization in amber for 25 million years
d. easily killed by boiling Correct Answers d. easily killed by
boiling
Examples of human defenses against pathogens include all of
the following EXCEPT:
a. skin and mucous membranes
b. washing action of tearing, sweating and urination
c. vomiting and diarrhea
d. chemical defenses like salt from sweat and acidic secretions
Correct Answers c. vomiting and diarrhea
Functions of the glycocalyx (capsule) include all of the
following EXCEPT
a biofilm formation
, b. increased virulence
c. source of sugars
d. protection against dehydration
e. replication. Correct Answers e. replication.
How are health care workers protected from hospital acquired
pathogens?
a. use of personal protective equipment (PPE)
b. use of universal precautions when dealing with body fluids
c. hand washing
d. All of these are correct choices. Correct Answers d. All of
these are correct choices.
How do bacteria help humans?
a. normal microbiota protect us from infection
b. aid digestion and produce vitamins
c. degrade environmental contaminants
d. aII of these are correct Correct Answers d. aII of these are
correct
How do prokaryotes sustain life as we know it on Earth?
a. photosynthetic prokaryotes produce glucose and
oxygen gas used by all other aerobic organisms.
b. NH4 generating bacteria live within roots of legumes an1d
other plants.
c. prokaryotes live in symbiotic relationships in stomachs, of
grazing animals to give them nutrients from plant material.
d. all of these are correct Correct Answers d. all of these are
correct
Questions With Complete Solutions
19 The characteristics of carbohydrates include:
a. monosaccharides serve as the building blocks for these
polymers
b. monosaccharides are joined together by covalent bonds
known as glycosidic links
c. monosaccharides are joined by hydrolytic reactions
d. only a and b are correct Correct Answers d. only a and b are
correct
Bacterial flagella work like a small outboard engine on a small
boat to move the bacterium. This movement includes:
a. chemotaxis
b. runs and tumbles
c. clockwise and counter-clockwise movement
d. all of these Correct Answers d. all of these
Cytoplasm is an often-overlooked feature of internal portion of
bacterial cell. Its unique features include:
a. viscous gel-like solution that slows rate of diffusion within
cells
b. mixture of soluble ions, metabolites and macromolecules
c. water that holds water-soluble chemicals
d. all of these are correct Correct Answers d. all of these are
correct
Differential staining requires:
a. preparation of a smear
b application of 2 or more different positive stains
,c. decolorizing chemical
d. all of these are correct Correct Answers d. all of these are
correct
DNA may be described as ________.
a. a macromolecule made up of monomers called nucleotides
b. the hereditary material of cells that is passed one generation to
the next
c. a double helix composed of small packets of information
called genes
d. all of these are correct Correct Answers d. all of these are
correct
Endospores are all of the following EXCEPT:
a. heat and chemical resistant
b. survive after being frozen for 10,000 years
c survive after fossilization in amber for 25 million years
d. easily killed by boiling Correct Answers d. easily killed by
boiling
Examples of human defenses against pathogens include all of
the following EXCEPT:
a. skin and mucous membranes
b. washing action of tearing, sweating and urination
c. vomiting and diarrhea
d. chemical defenses like salt from sweat and acidic secretions
Correct Answers c. vomiting and diarrhea
Functions of the glycocalyx (capsule) include all of the
following EXCEPT
a biofilm formation
, b. increased virulence
c. source of sugars
d. protection against dehydration
e. replication. Correct Answers e. replication.
How are health care workers protected from hospital acquired
pathogens?
a. use of personal protective equipment (PPE)
b. use of universal precautions when dealing with body fluids
c. hand washing
d. All of these are correct choices. Correct Answers d. All of
these are correct choices.
How do bacteria help humans?
a. normal microbiota protect us from infection
b. aid digestion and produce vitamins
c. degrade environmental contaminants
d. aII of these are correct Correct Answers d. aII of these are
correct
How do prokaryotes sustain life as we know it on Earth?
a. photosynthetic prokaryotes produce glucose and
oxygen gas used by all other aerobic organisms.
b. NH4 generating bacteria live within roots of legumes an1d
other plants.
c. prokaryotes live in symbiotic relationships in stomachs, of
grazing animals to give them nutrients from plant material.
d. all of these are correct Correct Answers d. all of these are
correct
