What is the distinction between bacteria and viruses?
a. Bacteria, composed only of DNA/RNA plus a protein coat, require a host so that the bacteria can grow and divide; viruses are single-celled microorganisms that do not require a host to grow and divide.
b. Bacteria are single-celled microorganisms that do not require a host to grow and divide; viruses, composed only of DNA/RNA plus a protein coat, require a host so that the virus can grow and divide
c. Both bacteria and viruses require a host so that they can grow and divide, but only viruses are composed of DNA/RNA and contain a protein coat.
d. Both bacteria and viruses are single-celled microorganisms that do not require a host to grow and divide, but only viruses are composed of DNA/RNA and contain a protein coat
Question 2
____ has the highest sexually transmitted infection rate in the industrialized world.
a. Denmark c. The U.S.
b. Brazil d. Canada
Three Mechanisms of Gene Transfer Found in Bacteria
Attack systems of pathogenic bacteria.
A plaque is a clear area in which all bacteria have been lysed by phages
Electronmicrograph showing a blood clot composed of fibrin, red blood cells, and tissue debris.
Pneumonia. This common lung inflammation may be caused by bacteria, viruses, or fungi and is often d
The DNA of S-type bacteria can transform R-type bacteria into the same S type.