Biology Chpt 20.1-3 Viruses, Prokaryotes & Diseases Flashcards
(24 cards)
Viruses can infect
A. Plants
B. Animals
C. Bacteria
D. All of the above
D. All of the above
If Iris is a living / non-living particle made up of proteins, nucleic acids, and sometimes lipids
non-living
Vaccines are the best way to prevent
Bacterial diseases. /. Viral infections
Viral infections
Antibiotics are used to treat
Bacterial diseases. /. Viral infections
Bacterial diseases.
NOT for viral infections
T/ F. Viruses can reproduce only by infected living cells.
True
Pathogenic viruses and bacteria are unable to change and evolve over time, greatly reducing their that. T / F
False
The constant changes are why we have to get flu shots every year for the new strain.
Also why drugs become less effective
Which of the following are true?
A. Viruses differ widely in terms of size and structure
B. Most viruses are so small they can be seen only with a powerful microscope
C. Viruses are much smaller than cells
D. All of the above
D. All of the above
Which of the following does NOT contribute to spread of new emerging diseases?
A. High speed travel
B. Shipment of food and consumer items between regions of the world
C. Development of antiviral drugs
D. Human populations that are no longer isolated by oceans and mountains
C. Development of antiviral drugs
T/F. The common cold, HIV and some cancers are caused by viruses.
True
Which of these are true?
A. All viruses are parasites and depend on living organisms for their existence
B. Viruses can evolve outside a living cell
C. Viruses depend on their hosts for nutrients
D. Viruses have their genetic code only in DNA
A & C are true
Which probably came first, viruses or cells?
God probably created both at the same time but if not, the virus came second as it is dependent on the host cell
Which of these are true of prokaryotes?
A. Smallest and most abundant organisms on Earth
B. Have DNA located outside the cytoplasm
C. Lack a nucleus
D. Are divided into two groups, Bacteria and Archaea
A & C & D are true
Bacteria live almost everywhere. T / F
True
Which of the following are classified as pathogens? A. Bacteria B. Viruses C. Fungi D. All of the above
D. All of them
Pathogens cause diseases that either _____________ living cells and tissues of the infected organism or that release _____________ that interfere with normal host activities.
Destroy
Toxins (poisons)
Which is NOT a way tho control bacteria?
A. Dislodge them with washing of hands or surfaces
B. Store food at high temperatures
C. Process food at high temperature through boiling, streaming our frying
D. Sterilize items Asst temperatures advice 100F
B. Store food at high temperatures
Should be stored at low temps to slow bacteria growth (fridge)
EXPLAIN HOW VIRUSES REPRODUCE
Infect a living cell and reproduce
EXPLAIN HOW VIRUSES CAUSE INFECTION
Lytic infection - enter cell, copy itself, explode and attack new cells
Lysogenic infection - integrates DNA with host cell. Replicates with host DNA
EXPLAIN HOW THE TWO GROUPS OF PROKARYOTES DIFFER
Bacteria - can be surrounded by a cell wall
Archaea - different membrane lipids, lack peptidoglycan
DESCRIBE HOW PROKAYOTES VARY IN STRUCTURE AND FUNCTION
Shape - rod, spherical or spiral
Chemical nature - prokaryotes or autotrophs (Photo or Chemo)
Movement -
Energy - either with or without oxygen
What is the role of bacteria in the world?
- decompose dead matter
- photosynthesis
- convert nitrogen gas for plant use
- used in industry, food production, and other ways for humans
EXPLAIN HOW BACTERIA CAUSE DISEASE
- destroy living cells and tissue directly
- release toxins (poisons_ that interfere with normal body functions
EXPLAIN HOW VIRUSES CAUSE DISEASE
Destroy living cells or disrupt cellular processes
DEFINE EMERGING DISEASE AND EXPLAIN WHY THEY ARE A THREAT TO HUMAN HEALTH
These diseases are evolved and unfamiliar. They can also travel faster through populations with global travel and commerce
