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Bacteria
Review Questions
True or False?
„ Bacteria
are the smallest living thing.
True
„ Bacteria
are the smallest living thing.
What structure help some bacteria
to move?
What structure help some bacteria
to move?
„ flagellum
How do bacteria move?
How do bacteria move?
„ Flagella
„ Twitch
their bodies
„ Carried by
– wind
– water
– another organism
True or False
„ Most
bacteria cause disease.
False
„ Most
bacteria cause disease.
Most bacteria are harmless.
True or False
„ Some
bacteria are heterotrophs.
True
„ Some
bacteria are heterotrophs.
Heterotrophic bacteria can feed off food,
dead matter, or other organisms.
True or False
„ Decomposers
are autotrophs.
False
„ Decomposers
„ Decomposers
are autotrophs.
do NOT make their own
food. They feed off of dead materials.
True or False
„ Blue
green bacteria are autotrophs.
True
„ Blue
green bacteria are autotrophs.
Blue green bacteria have
chlorophyll which makes
them green.
True or False
„ Bacteria
without flagella must stay in the
same location.
False
„ Bacteria
without flagella must stay in the
same location.
„ Bacteria
can twitch their bodies or be
carried away by wind and water.
http://www.microbiologybytes.com/video/motility.html
True or False
„ In
sexual reproduction, the number of
bacteria increases.
False
„ In
sexual reproduction, the number of
bacteria increases.
„ In
sexual reproduction, two different
bacteria share genetic material. No new
bacteria are made.
True or False
„A
bacteria can survive for many years as
an endospore.
True
„A
bacteria can survive for many years as
an endospore.
True or False
„ All
bacteria are autotrophs.
False
„ All
bacteria are autotrophs.
Some are autotrophs, but not all!
True or False
„ All
bacteria are prokaryotes.
True
„ All
bacteria are prokaryotes.
Bacteria do NOT have a nucleus.
prokaryote = no nucleus
True or False
„ Bacteria
are larger than viruses.
True
„ Bacteria
are larger than viruses.
True or False
„ The
genetic material of bacteria is found
in its nucleus.
False
„ The
genetic material of bacteria is found
in its nucleus.
Bacteria do not have
a nucleus!
Because bacteria do not have a
nucleus, they are classified as _______.
Because bacteria do not have a
nucleus, they are classified as _______.
„ prokarotes
The outer covering of a bacterium is
called the _______.
The outer covering of a bacterium is
called the _______.
„ cell
wall
The jelly-like fluid that contains the genetic
material of a bacteria is called __________.
The jelly-like fluid that contains the genetic
material of a bacteria is called __________.
„ the
cytoplasm
What term refers to bacteria that are
found living in the soil?
What term refers to bacteria that are
found living in the soil?
„ decomposers
What is the shape of a bacterium?
What is the shape of a bacterium?
„ rod
„ spiral
„ sphere
Why do bacteria from endospores?
Why do bacteria from endospores?
„ To
survive extreme conditions
– No food
– No water
– Extreme temperatures
When do bacteria form endospores?
When do bacteria form endospores?
„ Extreme
conditions
– No food
– No water
– Extreme temperatures
How do autotrophic bacteria obtain
energy?
How do autotrophic bacteria obtain
energy?
„ Use
photosynthesis to make food
How are bacteria helpful with
digestion?
How are bacteria helpful with
digestion?
„ Help
break down food
„ Make vitamins
„ Prevent harmful bacteria from growing in
the small intestines
How are bacteria helpful in other ways?
How are bacteria helpful in other ways?
„ Used
to clean up oil spills
„ Decompose materials in the soil
„ Used to treat sewage
„ Used to make foods
„ Used to make medicines
How are bacteria harmful?
How are bacteria harmful?
„ Cause
disease – strep, anthrax, infection
„ Cause tooth decay
„ Spoil food
„ Destroy water habitats