Which characteristic of viruses makes them useful in gene therapy?
their ability to remain inactive for a long time
their inability to multiply in cells
their inability to take over the functions of host cells
their ability to enter cells
Their ability to enter cells is the characteristic of viruses that makes them useful in gene therapy.
.
Which characteristic do viruses share with living things?
Both need to eat and produce waste.
Both are named using binomial nomenclature.
Both can multiply or reproduce.
Both are made of cells.
Both can multiply or reproduce is the characteristic that viruses share with living things.
.
Bacteria in swellings on the roots of peanut plants convert _____ gas from the air into compounds that the plants need to grow.
methane
nitrogen
oxygen
carbon dioxide
Bacteria in swellings on the roots of peanut plants convert nitrogen gas from the air into compounds that the plants need to grow.
What process results in genetically different bacteria?
conjugation
asexual reproduction
respiration
binary fission
Conjugation is the process that can result in genetically different bacteria.
Which type of virus begins multiplying as soon as it enters a host cell?
active virus
bacteriophage
inactive virus
hidden virus
Active virus is the type of virus that begins multiplying as soon as it enters a host cell.
Which is a role of harmful bacteria?
making insulin
producing oxygen
causing disease
converting nitrogen
Causing disease is a role of harmful bacteria.
Which statement describes a bacterial cell infected by a hidden virus?
The infected cell contains so many viruses it is about to burst open.
The infected cell has its genetic material and the genetic material of the virus.
The infected cell’s functions are immediately overtaken by the virus.
The infected cell’s membrane begins to dissolve from the virus’s presence.
The statement "The infected cell has its genetic material and the genetic material of the virus" describes a bacterial cell infected by a hidden virus.
Which of the following is found in the cytoplasm of bacterial cells?
cell membrane
genetic material
nucleus
flagella
Genetic material is found in the cytoplasm of bacterial cells.
Certain bacteria can be used to _____ by converting poisonous chemicals into harmless ones.
eat dead organisms
produce medicines
fix nitrogen compounds
clean up oil spills
Certain bacteria can be used to clean up oil spills by converting poisonous chemicals into harmless ones.
_____ is a promising use of viruses.
Gene therapy
Infection
Bacteriophage
Disease
Gene therapy is a promising use of viruses.
Which structures are always found in bacterial cells?
nuclei
flagella
coats
ribosomes
Flagella and ribosomes are always found in bacterial cells. Nuclei and coats are not typically found in bacterial cells.
Illnesses that pass from one organism to another are called _____ diseases.
antibiotic-resistant
incurable
toxic
infectious
Illnesses that pass from one organism to another are called infectious diseases.
Which gas is added to the atmosphere by bacteria?
nitrogen
hydrogen
oxygen
carbon dioxide
Bacteria add nitrogen gas to the atmosphere.
The genetic material of a virus is found in its _____.
core
membrane
nucleus
coat
The genetic material of a virus is found in its core.
he term antibiotic resistant refers to bacteria that _____.
are dead or altered
grow resistant to a vaccine
survive in the presence of an antibiotic
become weakened by antibiotics
The term antibiotic resistant refers to bacteria that survive in the presence of an antibiotic.
16.
Heterotrophic bacteria obtain food by _____.
using the energy from chemicals in their environment
helping autotrophs make food
consuming autotrophs and other heterotrophs
capturing the sun’s energy
Heterotrophic bacteria obtain food by consuming autotrophs and other heterotrophs.
The process of breaking down food to release its energy is called _____.
binary fission
respiration
conjugation
nutrition
The process of breaking down food to release its energy is called respiration.
Which of the following stimulates a person’s body to produce chemicals that destroy viruses or bacteria?
endospore
toxin
vaccine
antibiotic
A vaccine stimulates a person's body to produce chemicals that destroy viruses or bacteria.
Which structure is not found in bacterial cells?
cytoplasm
nuclei
ribosomes
flagella
Nuclei is not found in bacterial cells.
Why do doctors not prescribe antibiotics for colds?
Bacteria feed off antibiotics.
Antibiotics make colds worse.
Colds are not infectious.
Antibiotics do not kill viruses.
Doctors do not prescribe antibiotics for colds because antibiotics do not kill viruses.
How does a vaccine work?
It activates the body’s natural defenses.
It treats the symptoms of an infection.
It attacks antibiotic-resistant bacteria.
It weakens the cell walls of bacteria, bursting them.
A vaccine works by activating the body's natural defenses. It stimulates the immune system to recognize and fight against specific pathogens, such as viruses or bacteria, preventing or reducing the severity of future infections.
Which of the following is a long, whiplike structure that helps some bacteria move?
cytoplasm
cell wall
flagellum
ribosome
A flagellum is a long, whiplike structure that helps some bacteria move.
Endospores form during _____.
sunlight hours
binary fission
harsh environmental conditions
respiration
Endospores form during harsh environmental conditions.
Viruses are made of _____.
cells
bacteria
protein
archaea
Viruses are made of protein.
Which describes binary fission of bacteria?
asexual reproduction
obtaining food
producing energy
forming endospores
Binary fission of bacteria describes asexual reproduction.
Which directly provides energy for a virus?
a parasite
some food
the sun
its host
A virus directly obtains energy from its host.
Which statement about a virus’s coat is true?
It helps the virus attach to the host.
It blocks the cell’s proteins.
It contains the genetic material.
It is inside the virus’s core.