Name:___________________
Date:____________________
Class:___________________
Bacteria
1. What does Tim mean when he says bacteria are
the most abundant form of life on earth?
6. Which of the following is a true statement about
bacteria?
A. They're the smallest form of life on earth
B. They're the most commonplace form of life on earth
C. They're the most diverse form of life on earth
D. They're the most specialized form of life on earth
A. Bacteria exist in only a few environments on earth
B. Bacteria can grow to extremely large sizes
C. Most bacteria are harmful to humans
D. Bacteria can be both harmful and helpful to humans
2. What do all bacteria have in common?
7.
A. They all have cell nuclei
B. They're all multi-cellular organisms
C. They're all single-celled organisms
D. They can all be found inside the human body
3. How did bacteria make complex life on Earth
possible?
A. By releasing oxygen into the atmosphere
B. By destroying life-inhibiting volcanoes
C. By evolving rapidly into multi-celled organisms
D. All of the above
What effect do antibiotics
have on bacteria?
A. They help bacteria grow in size
B. They prevent bacteria from digesting food
C. They destroy bacteria
D. They help bacteria reproduce
8. Which of the following depicts one of the most
common forms of bacteria?
A.
B.
C.
D.
4. What might happen if you didn't have bacteria in
your digestive tract?
A. Your intestines would shut down
B. Your body couldn't break down certain types of food
C. You would never get sick
D. You wouldn't be able to eat vegetables
5. Nitrogen-fixing bacteria help plants thrive. What
do nitrogen-fixing bacteria do?
A. Absorb harmful nitrogen from the bodies of plants
B. Absorb nitrogen in the soil before it harms plants
C. Convert nitrogen in the soil into a form that plants
can absorb
D. Transform nitrogen into carbon dioxide
9.
What term best describes the
function of flagella in
bacteria?
A. Locomotion
B. Digestion
C. Absorption
D. Reproduction
10. How are bacterial cells different from plant and
animal cells?
A. Bacterial cells contain many more cell organelles
B. Bacterial cells contain almost no cell organelles
C. Bacterial cells have more complex cell organelles
D. Bacterial cells have well-defined nuclei
Name:___________________
Date:____________________
Class:___________________
Viruses
1.
What would happen to a
virus if it couldn't find a host
cell to invade?
6.
What do the viruses that
cause HIV, hepatitis, and
ebola have in common?
A. It wouldn't be able to multiply
B. It wouldn't be able to travel through the air
C. Its genetic information would wither away
D. It would not be able to exist
A. They cannot replicate inside human cells
B. They are spread through contaminated water
C. They are harmless viruses
D. They can kill people
2. Which term best describes viruses?
7. Which of the following is a true statement about
viruses?
A. Miniscule
B. Gargantuan
C. Harmless
D. Sterile
3. What do viruses have in common with your
body's cells?
A. Their genetic material is surrounded by a nucleus
B. They contain many complex organelles
C. They contain DNA or RNA
D. They are surrounded by capsids
4. What is the difference between DNA and RNA?
A. RNA is a more complex molecule than DNA
B. RNA contains genetic information; DNA does not
C. DNA is a more complex molecule than RNA
D. DNA contains genetic information, RNA does not
5. What's the difference between a pathogenic
virus and a harmless one?
A. Pathogenic viruses make copies of themselves;
harmless ones don't
B. Pathogenic viruses get inside cells; harmless ones
don't
C. Pathogenic viruses are surrounded by capsids;
harmless ones aren't
D. Pathogenic viruses end up killing cells; harmless
ones don't
A. They are only spread through person-to-person
contact
B. They can be spread in a number of different ways
C. All of them are harmful to humans
D. They can only be spread through exposure to
animal waste
8. What does a virus do once it's inside one of
your cells?
A. It stays inside the cell for a while, and then leaves
B. It eats up all of the machinery in the cell
C. It uses the cell's machinery to make copies of itself
D. It prevents the mitochondria from converting
glucose to ATP
9. What can you infer about the virus that causes
the common cold?
A. It is harmless
B. It is pathogenic, but not usually deadly
C. It is usually deadly, but not pathogenic
D. It cannot be spread by person-to-person contact
10.
If you have a cold, why
should you cover your
mouth when you sneeze?
A. To prevent other people from breathing in the
viruses you expel
B. To prevent viruses from infecting the cells in your
nose and mouth
C. To keep as many viruses as possible inside your
body
D. To get all of the cold viruses out of your body and
onto your skin