All microorganisms are best defined as organisms that:
A. cause human disease
B. lack a cell nucleus
C. are infectious particles
D. are too small to be seen with the unaided eye
E. can only be found growing in laboratories
D. are too small to be seen with the unaided eye
Which of the following is a difference between prokaryotic and eukaryotic cells?
A. prokaryotes have a cell wall, while eukaryotes do not
B. prokaryotes have multiple linear chromosomes while eukaryotes have a single, circle
chromosome
C. eukaryotes have no membrane bound organelles, while prokaryotes do contain them
,D. prokaryotes have a nucleus while eukaryotes do not
E. prokaryotes contain the bacteria and archea, while eukaryotes include all other livingorganisms
E. prokaryotes contain the bacteria and archea, while eukaryotes include all other living organisms
Which of the following is found in ALL bacterial cells?
A. flagella
B. cell wall
C. pili
D. spore
E. none of the above
E. none of the above
Microbes are beneficial in that they have been used to:
A. treat waste water
B. clean up toxic spills
C. decompose organic material
D. all of the above
E. none of the above
D. all of the above
Scientists use microbes to produce drugs, hormones, and enzymes. This type of biotechnology
involves the transfer of foreign genetic material into a microbe, a process called:
,A. recombinant DNA technology
B. gene therapy
C. bioremediation
D. polymerase chain reaction
A. recombinant DNA technology
Which of the following is the smallest cause of infectious disease?
A. protozoans
B. bacteria
C. helminths
D. viruses
E. none of the above
D. viruses
Gram negative bacteria differ from gram positive in that they:
A. are non-pathogenic
B. do not have a cell wall
C. have flagella
D. have an outer membrane surrounding the cell wall
E. none of the above
D. have an outer membrane surrounding the cell wall
, Which of the following is mismatched?
A. ribosomes - protein synthesis
B. inclusions - excess cell nutrients and materials
C. plasmids - genes essential for growth and metabolism
D. nucleoid - hereditary material
E. cytoplasm - dense, gelatinous solution
C. plasmids - genes essential for growth and metabolism Bacterial endospores are not produced by:
A. staphylococcus
B. bacillus
C. clostridium
D. all of the choices produce endospores
A. staphylococcus
Which of the following is a unique characteristic of viruses that distinguishes them from other
major groups of microorganisms?
A. cause human disease
B. lack a nucleus
C. cannot be seen without a microscope
D. contain genetic material
E. lack cell structure
E. lack cell structure