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Worksheets1.3.A.Viruses and Bacteria
Total questions: 30
Worksheet time: 18mins
Which is NOT a characteristic of a virus ?
can make or use food
can only multiply inside a living cell
is a cell
respond to its surrounding
When a virus invades a living cell, the virus's genetic material
takes over many of the cells functions.
breaks apart.
attaches to the outside of the cell.
makes the cell's genetic material produce new viruses.
A virus’s _________________________ contains the instructions for making new viruses.
protein coat
genetic material
outside membrane
nucleus
Which phrase describes the size of virus particles?
smaller than cells
slightly larger than cells
the same size as cells
much larger than cells
What are viruses made of?
genetic material
protein coat
cell wall
hyphae
A ___________provides a source of energy or a suitable environment for a virus or an organism to live.
parasite
virus
toxin
host
A substance that stimulates the body to produce chemicals that destroy viruses or bacteria is called a
vaccine.
cytoplasm.
toxin.
hyphae
What are vaccines made of?
toxins
weakened or killed pathogens
genetic materials
protein and lipid particles
How does a vaccine work?
It activates the body’s natural defenses.
It weakens the cell walls of bacteria causing the cells to burst.
It treats the symptoms of an infection.
It attacks antibiotic-resistant bacteria.
Bacteria are prokaryotes because
they do not have genetic material.
their genetic material is not in a nucleus.
they have a nucleus filled with genetic material.
they are made of only one cell.
Name part "a" of the bacterial cell.
pili
genetic material
cytoplasm
ribosome
cell wall
Name part "b" of the bacterial cell.
pili
genetic material
cytoplasm
ribosome
cell wall
Name part "c" of the bacterial cell.
pili
genetic material
cytoplasm
ribosome
cell wall
Name part "d" of the bacterial cell.
pili
genetic material
cytoplasm
ribosome
cell wall
Name part "e" of the bacterial cell.
pili
genetic material
cytoplasm
ribosome
cell wall
Name part "f" of the bacterial cell.
pili
cell wall
cytoplasm
ribosome
cell membrane
Ribosomes
are tiny hairs that help cell move and reproduce.
are string-like chemical instructions for cell.
are everything inside the cell membrane.
are round structures where proteins are made.
protect the cell from attacks and from drying out.
The cell membrane
is made of tiny hairs that help cell move and reproduce.
is a string-like chemical instruction for cell.
controls what comes in and out of the cell
is a round structures where proteins are made.
protects the cell from attacks and from drying out.
Pili
are tiny hairs that help cell move and reproduce.
are string-like chemical instructions for cell.
are everything inside the cell membrane.
are round structures where proteins are made.
protect the cell from attacks and from drying out.
Heterotrophic bacteria obtain food by
capturing the sun’s energy.
using the energy from chemicals in their environment.
consuming autotrophs and other heterotrophs.
helping autotrophs make food.
Which of the following is true about the sexual reproduction of bacteria?
Binary fission
Two bacterial cells come together and exchange genetic material.
Conjugation
Growing and then dividing into two identical cells.
Does not produce more bacteria, but it does allow genetic information to spread.
Bacteria in the Shigella genus cause the disease shigellosis. The symptoms of shigellosis include diarrhea, fever, and intestinal cramping. The disease is unpleasant, but most people recover within a week. Shigellosis is transmitted from one person to another through bodily wastes. You can catch shigellosis from a baby when changing its diaper. People also catch the disease by drinking contaminated water. The best way to avoid shigellosis is through frequent hand-washing with soap. Shigella bacteria can survive on a fly’s body for up to 24 days. Suppose that a fly lands on waste from an infected person. That fly could then spread bacteria on everything it lands on for almost a month! How do bacteria survive for so long during harsh conditions until finding a host?
They store up fat and hibernate until conditions improve.
They feed each other so that every bacterium has a little food.
They have ribosomes where food is made.
They form an endospore with thick walls and await better conditions.
In which ways bacteria are useful for us?
oxygen production
causing strep throat
medicine production
environmental cleanup
What important role do bacteria called decomposers play?
They return basic chemicals to the environment.
They slow down food spoilage.
They kill harmful bacteria.
They produce vitamins.
Which of the following is NOT a role of bacteria that live in human bodies?
digesting food
preventing disease-causing bacteria from attaching to your intestines
making vitamins
preventing diabetes
Bacteria in swellings on the roots of peanut plants convert ____________________ gas from the air into compounds the plants need to grow.
oxygen
carbon dioxide
nitrogen
hydrogen
Label the parts of the bacterial cell.
Match the parts of a bacterial cell to their functions.
whip-like structure that help the bacterium move
flagellum
contains the instructions for all the cell’s functions
genetic material
gel-like fluid that moves materials inside the cell
cytoplasm
produce proteins
ribosome
controls what comes in and out of the cell
cell membrane
Some bacteria move by using a long, whip-like structure called a(n) ____________________.
flagellum
cytoplasm
genetic material
ribosome
The ____________ is the outermost structure of most bacterial cells.
cytoplasm
cell membrane
cell wall
ribosome
