Which of the following is one important difference between a virus and a bacterial cell?
A. a virus is much larger in size than a bacterial cell
B. a virus always causes more severe disease than a bacterial cell
C. a virus can never reproduce on its own, but a bacterial cell can
D. a virus does not contain genetic material, but a bacterial cell does
The single deadliest entity on Earth is the ______________.
Why is it that a virus that infects a human is not likely to infect a dog or a cat?
A. viruses only infect humans
B. viruses are specific to a host
C. dogs and cats do not get diseases
D. viruses do not infect living things
A virus is made up of
B. protein coat
C. genetic material and protein coat
What type of cells are infected by viruses?
D. all of these
cell in which a virus reproduces
B. host cell
Viruses are considered nonliving because they
A. contain too much protein
B. do not have a specific shape
C. cannot be exposed to light
D. do not have ALL of the characteristics of living things
Vaccines are produced by using _____ from another organism.
B. DNA or RNA
D. a nucleus
A disease that occurs over a wide geographical area and affects a large proportion of the population is a(n)
C. natural disaster
Which of the following is a true statement about viruses?
A. viruses are smaller than bacteria
B. viruses are only treated with antibiotics
C. most viruses are saprotrophs
D. all viruses are multicellular
A/an ________ is an injection of a weakened form of a pathogen to help the individual gain immunity from a disease.
You are a doctor and Little Billy is in your office with the flu. His mother wants you to prescribe an antibiotic. Which would be the best response?
A. “Absolutely, get that kid an antibiotic!”
B. “Actually, he just needs to take a painkiller.”
C. “Unfortunately, antibiotics do not work against viruses like the flu.”
D. “Give him a vaccine and he will feel better right away!”
Which statement about viruses is true?
A. all viruses are latent
B. viruses are considered living things
C. all viruses contain DNA
D. viruses do not contain organelles
Spherical, complex, cylindrical, and polyhedral are all
A. types of viruses
B. life cycles of viruses
C. viruses that infect only animals
D. shapes of viruses
What are viruses made of?
A. fat molecules
B. DNA or RNA
C. eukaryotic cells
______________________________ doses of the flu vaccine in the United States has been given (October 2019).
A. 16 Million
B. 6 Million
C. 116 Million
___________________________ develops when a mother passes antibodies to her unborn baby.
A. natural immunity
C. natural selection
Influenza is caused by a ___________________.
Viruses are difficult to treat because they
A. take too long to reproduce
B. are constantly changing
C. are too big
D. have a cell wall
When a virus enters a cell and it immediately makes copies of itself this is called _______________________________.
Viruses are _______.
The head of the bacteriophage sits on a long ____________.
B. tail fibers
The organization in the United States that tracks diseases and vaccinations is called the
A. CFC — Combined Federal Campaign
B. CDC — Center for Disease Control and Prevention
C. NACDP — National Association for Control of Disease & Prevention
Viruses can affect which types of organisms? Except:
Antibiotics only work against what organisms ?
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