BIOL 1002 REAL EXAM 2025 PRACTICE
QUESTIONS AND CORRECT ANSWERS/ BIOLOGY
1002 LSU PREP WITH 300 EXAM PRACTICE
QUESTIONS AND CORRECT VERIFIED ANSWERS
Prokaryotes have __________. - ANSWER large circular chromosome
Peptidoglycan is a component of the cell wall of - ANSWER bacteria. All of the
organisms in the domain Bacteria have peptidoglycan in their cell walls whereas
none in the domain Archaea do.
Bacteria and Archaea differ in the structure and composition of their __________. -
ANSWER plasma membrane, ribosomes, and RNA polymerases
The small circular DNA molecules found only in prokaryotes are known as
__________ - ANSWER plasmids
During bacterial conjugation, the transferred item is a __________ - ANSWER
plasmid
Which of the following traits allows some bacteria to survive extreme conditions for
millions of years? - ANSWER endospore formation
Which of the following enable plants to obtain a usable form of nitrogen? - ANSWER
bacteria
The majority of bacteria are __________. - ANSWER harmless
Which of the following statements is true of viruses, viroids, and prions? - ANSWER
They are nonliving, infectious agents or pathogens that can cause disease in
organisms.
Which of the following statements is FALSE?
Prions are infectious nucleotides.
Viruses cannot reproduce outside a host cell.
Some viruses cause cancer.
Viroids lack a protein coat. - ANSWER prions are infectious nuclotides.
(They are proteins)
Gram Stain - ANSWER can be used to help differentiate between some classes of
bacteria and gives the researcher information about the construction of the cell wall.
Classification of organisms may use many kinds of traits. Which of these are used in
prokaryotic classification? - ANSWER cell shape, means of locomotion, nutrient
sources, and staining properties.
,The simple form of cell division by which prokaryotic cells reproduce is called
__________. - ANSWER binary fission
At the end of conjugation, __________. - ANSWER one cell has given a copy of a
plasmid to another, while keeping one copy for itself.
Which structures do bacteria use to move? - ANSWER flagella
Sexual reproduction performed by eukaryotes is similar to bacterial conjugation
because - ANSWER genetic variability increases
Which of the following is an autotroph because of the photosynthesis it performs?
cyanobacteria
viruses
prions
endospores - ANSWER cyanobacteria
Which of these is a bacterial disease?
Ebola
AIDS
tetanus
common cold - ANSWER tetanus
Which of the following pairs of organism and disease is INCORRECT
bacterium: syphilis
prion: kuru
virus: AIDS
archaean: gonorrhea - ANSWER archaen:gonorrhea
What are viruses that attack bacteria called? - ANSWER bacteriophages
What components make up a virus? - ANSWER DNA or RNA and a protein coat
Viruses make new viral copies (reproduce) __________. - ANSWER in a host cell
only
After a retrovirus enters its host cell, __________. - ANSWER reverse transcription
creates a strand of DNA complementary to the viral RNA. The virus must reverse
transcribe its RNA into DNA before it can begin to produce more virus components.
After reverse transcription creates viral DNA from the viral RNA, the viral DNA
__________. - ANSWER enters the host cell's nucleus and is integrated into the
host's chromosome
After viral DNA and viral envelope proteins are assembled into new viruses, they exit
the host cell via __________. - ANSWER exocytosis
The name of the process by which DNA is transferred from one prokaryote to
another via a cytoplasmic bridge is - ANSWER conjugation
, A community of prokaryotes surrounded by slime and adhering to a surface is called
a(n) - ANSWER biofilm
Which of the following statements about archaea is not true?
Some archaea can survive and thrive at temperatures above the boiling point of
water.
The cell walls of archaea contain peptidoglycan.
Archaea are not closely related to bacteria.
Archaea are not known to cause any disease of plants or animals. - ANSWER The
cell walls of archaea contain peptidoglycan.
Applying fertilizer near an oil spill to increase the population of oil-consuming
bacteria is an example of - ANSWER bioremediation
___________have peptidoglycan in their ______________, but_____________do
not. - ANSWER Bacteria, cell walls, archaea
Prokaryotic cells are (larger/smaller) than eukaryotic cells. The most common
shapes of prokaryotes are , , and . - ANSWER Smaller; Spherical; Rod-shaped;
Corkscrew shaped
Many prokaryotes use _________________ to move about. Some prokaryotes
secrete slime that protects them when they aggregate in communities
called_____________. Other prokaryotes can survive long periods and extreme
conditions by producing protective structures called______________ - ANSWER
Flagella, Biofilm, Endospores
____________________-bacteria inhabit environments that lack oxygen.
________________-bacteria capture energy from sunlight. - ANSWER Anaerobic;
Photosynthetic
Prokaryotes reproduce by___________________and may sometimes exchange
genetic material through the process of________________ - ANSWER Prokaryotic
fission; Conjugation
The plant nutrient ammonium is produced by _________________ bacteria in the
soil and in nodules. Prokaryotes that live in the digestive tracts of cows and rabbits
break down ________________ in the leaves that those mammals eat. - ANSWER
Nitrogen-fixing; cellulose
Cholera, gonorrhea, and pneumonia are some of the diseases caused by pathogenic
________________- . Harmful strains of E. coli can be transmitted to humans by
consumption of , , or . - ANSWER Bacteria; meat, eggs, produce
A virus consists of a molecule of______________or_______________ surrounded
by a(n)______________-coat. A virus cannot reproduce unless it enters
a(n)__________________cell. A virus that infects bacteria is known as
a(n)__________--. - ANSWER DNA, RNA, Protein, Host, bacteriophage
QUESTIONS AND CORRECT ANSWERS/ BIOLOGY
1002 LSU PREP WITH 300 EXAM PRACTICE
QUESTIONS AND CORRECT VERIFIED ANSWERS
Prokaryotes have __________. - ANSWER large circular chromosome
Peptidoglycan is a component of the cell wall of - ANSWER bacteria. All of the
organisms in the domain Bacteria have peptidoglycan in their cell walls whereas
none in the domain Archaea do.
Bacteria and Archaea differ in the structure and composition of their __________. -
ANSWER plasma membrane, ribosomes, and RNA polymerases
The small circular DNA molecules found only in prokaryotes are known as
__________ - ANSWER plasmids
During bacterial conjugation, the transferred item is a __________ - ANSWER
plasmid
Which of the following traits allows some bacteria to survive extreme conditions for
millions of years? - ANSWER endospore formation
Which of the following enable plants to obtain a usable form of nitrogen? - ANSWER
bacteria
The majority of bacteria are __________. - ANSWER harmless
Which of the following statements is true of viruses, viroids, and prions? - ANSWER
They are nonliving, infectious agents or pathogens that can cause disease in
organisms.
Which of the following statements is FALSE?
Prions are infectious nucleotides.
Viruses cannot reproduce outside a host cell.
Some viruses cause cancer.
Viroids lack a protein coat. - ANSWER prions are infectious nuclotides.
(They are proteins)
Gram Stain - ANSWER can be used to help differentiate between some classes of
bacteria and gives the researcher information about the construction of the cell wall.
Classification of organisms may use many kinds of traits. Which of these are used in
prokaryotic classification? - ANSWER cell shape, means of locomotion, nutrient
sources, and staining properties.
,The simple form of cell division by which prokaryotic cells reproduce is called
__________. - ANSWER binary fission
At the end of conjugation, __________. - ANSWER one cell has given a copy of a
plasmid to another, while keeping one copy for itself.
Which structures do bacteria use to move? - ANSWER flagella
Sexual reproduction performed by eukaryotes is similar to bacterial conjugation
because - ANSWER genetic variability increases
Which of the following is an autotroph because of the photosynthesis it performs?
cyanobacteria
viruses
prions
endospores - ANSWER cyanobacteria
Which of these is a bacterial disease?
Ebola
AIDS
tetanus
common cold - ANSWER tetanus
Which of the following pairs of organism and disease is INCORRECT
bacterium: syphilis
prion: kuru
virus: AIDS
archaean: gonorrhea - ANSWER archaen:gonorrhea
What are viruses that attack bacteria called? - ANSWER bacteriophages
What components make up a virus? - ANSWER DNA or RNA and a protein coat
Viruses make new viral copies (reproduce) __________. - ANSWER in a host cell
only
After a retrovirus enters its host cell, __________. - ANSWER reverse transcription
creates a strand of DNA complementary to the viral RNA. The virus must reverse
transcribe its RNA into DNA before it can begin to produce more virus components.
After reverse transcription creates viral DNA from the viral RNA, the viral DNA
__________. - ANSWER enters the host cell's nucleus and is integrated into the
host's chromosome
After viral DNA and viral envelope proteins are assembled into new viruses, they exit
the host cell via __________. - ANSWER exocytosis
The name of the process by which DNA is transferred from one prokaryote to
another via a cytoplasmic bridge is - ANSWER conjugation
, A community of prokaryotes surrounded by slime and adhering to a surface is called
a(n) - ANSWER biofilm
Which of the following statements about archaea is not true?
Some archaea can survive and thrive at temperatures above the boiling point of
water.
The cell walls of archaea contain peptidoglycan.
Archaea are not closely related to bacteria.
Archaea are not known to cause any disease of plants or animals. - ANSWER The
cell walls of archaea contain peptidoglycan.
Applying fertilizer near an oil spill to increase the population of oil-consuming
bacteria is an example of - ANSWER bioremediation
___________have peptidoglycan in their ______________, but_____________do
not. - ANSWER Bacteria, cell walls, archaea
Prokaryotic cells are (larger/smaller) than eukaryotic cells. The most common
shapes of prokaryotes are , , and . - ANSWER Smaller; Spherical; Rod-shaped;
Corkscrew shaped
Many prokaryotes use _________________ to move about. Some prokaryotes
secrete slime that protects them when they aggregate in communities
called_____________. Other prokaryotes can survive long periods and extreme
conditions by producing protective structures called______________ - ANSWER
Flagella, Biofilm, Endospores
____________________-bacteria inhabit environments that lack oxygen.
________________-bacteria capture energy from sunlight. - ANSWER Anaerobic;
Photosynthetic
Prokaryotes reproduce by___________________and may sometimes exchange
genetic material through the process of________________ - ANSWER Prokaryotic
fission; Conjugation
The plant nutrient ammonium is produced by _________________ bacteria in the
soil and in nodules. Prokaryotes that live in the digestive tracts of cows and rabbits
break down ________________ in the leaves that those mammals eat. - ANSWER
Nitrogen-fixing; cellulose
Cholera, gonorrhea, and pneumonia are some of the diseases caused by pathogenic
________________- . Harmful strains of E. coli can be transmitted to humans by
consumption of , , or . - ANSWER Bacteria; meat, eggs, produce
A virus consists of a molecule of______________or_______________ surrounded
by a(n)______________-coat. A virus cannot reproduce unless it enters
a(n)__________________cell. A virus that infects bacteria is known as
a(n)__________--. - ANSWER DNA, RNA, Protein, Host, bacteriophage
