Chapter 2: Viruses And Bacteria Question Preview (ID: 22595)
7th Grade.
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Why are viruses like parasites?
a) They destroy the cells they enter.
b) They multiply.
c) They use energy to develop.
d) They make their own food.
A virus needs energy to
a) make food.
b) grow and develop.
c) make cells.
d) multiply
A virus’s proteins are important because they
a) contain the genetic material.
b) make new virus particles.
c) provide energy for the virus.
d) help the virus attach to its host.
What ability of viruses makes them useful in gene therapy?
a) their ability to enter cells
b) their ability to remain inactive for a long time
c) their ability to multiply in cells
d) their ability to take over the functions of host cells
Which shape describes some bacterial cells?
a) threadlike
b) bulletlike
c) rodlike
d) bricklike
What process results in genetically different bacteria?
a) binary fission
b) respiration
c) conjugation
d) asexual reproduction
Endospores form during
a) binary fission.
b) sunlight hours.
c) respiration
d) harsh environmental conditions.
What important role do bacteria called decomposers play?
a) They return basic chemicals to the environment.
b) They slow down food spoilage.
c) They kill harmful bacteria.
d) They produce vitamins.
Which of the following is NOT a role of bacteria that live in human bodies?
a) digesting food
b) preventing disease-causing bacteria from attaching to your intestines
c) making vitamins
d) preventing diabetes
Which of the following is an example of indirect contact that spreads some infectious diseases?
a) touching and hugging
b) animal bites
c) eating contaminated food
d) inhaling infected drops of moisture
Binary fission is the bacterial process of
a) asexual reproduction.
b) obtaining food.
c) producing energy.
d) forming endospores.
Viruses are considered to be nonliving because they
a) cannot multiply.
b) produce wastes.
c) are not cells.
d) use energy to grow.
The process of breaking down food to release its energy is called
a) conjugation
b) binary fission.
c) respiration
d) nutrition
Which virus is named for the organism that it infects?
a) Ebola virus
b) small pox virus
c) Epstein-Barr virus
d) bacteriophage
What provides energy for a virus?
a) food
b) its host
c) the fun
d) a parasite
The term “antibiotic resistant” refers to bacteria that
a) are resistant to a vaccine.
b) survive in the presence of an antibiotic.
c) are weakened and destroyed by antibiotics.
d) are dead or altered.
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