1.1-1.2 Microbial World and You Flashcards
A new microorganism has been isolated from hot springs in Yellowstone Nation Park. It consists of single cells, which appear to lack a nucleus. Chemical analysis shows the presence of DNA and RNA in the cytoplasm and peptidoglycan in the cell wall. In which of the following groups will this organism be classified?
Bacteria
The study of Protozoa
Parasitology
Which of the following types of microorganisms and its description are not correctly matched?
Bacteria-prokaryotic
Protozoa-small animals
Fungi-eukaryotic
Helminths- multicellular animals
Protozoa- small animals
Microbes are not responsible for
Antibody production
Which of the following processes are beneficial activities of microorganisms?
Recycling elements in the environment
Decomposing sewage
Producing foods and chemicals
All of the listed responses are correct
All of the listed responses are correct
Biofilms are commonly found in which of the following environments?
All of the listed responses are correct
A rock in a lake
Teeth
Water pipes
Medical devices
All of the following responses are correct
Which of the following properties are true of both bacteria and archaea?
Both are characterized as prokaryotes
Both have cell walls composed of peptidoglycan
Both contain either DNA or RNA
Both bacteria and archaea contain methanogerns, extreme halophiles, and extreme thermophiles
Both are characterized as prokaryotes
Which of the following best describes gene therapy?
Use of harmless virus to insert gene in a host cell
Use of microbes for bioremediation
Use of microbes to control pests
Use of microbes to recycle nitrogen from the air into the soil
Use of harmless virus to insert gene in a host cell
All of the following describe a major feature used to classify organisms into three domains ( Bacteria, Archaea, Eukarya)
Presence or absence of DNA
Presence or absence of peptidoglycan
Nutritional and metabolic factors
Presence or absence of a nucleus
Presence or absence of DNA
Which of the following is true of scientific names assigned to living organisms
The scientific name is always underlined or italicized
Algae are
Photosynthetic and classified as eukaryotes
In the scientific name Escherichia coli, escherichia is the
Genus name
Which of the following properties are true of both bacteria and viruses?
Both use a molecule of nuclei acid to determine heredity
Both contain DNA and RNA
Both are surrounded by a protein coat
Both can replicate using biogenesis
Both have cell walls composed of peptidoglycan
Both use a molecule of nuclei acid to determine heredity
Which of the following is characteristic of bacteria
Bacteria lack a membrane bound nucleus
Bacteria reproduce by cell division called mitosis
Bacteria have cellulose or chitin in their cell walls
Bacteria have DNA or RNA but not both
Bacteria live in extreme environments including pH, temperature and pressure extremes
Bacteria lack a membrane bound nucleus
All of the following are eukaryotes except
Fungi
Algae
Bacteria
Protozoa
Helminths
Bacteria
Which of the following is a scientific name
Legionella pneumophila
Which of the following is not a characteristic of archaea
Their cell walls contain peptidoglycan
They are not known to cause disease
They are often found in extreme environments
Some lack cell walls
Their cell walls contain peptidoglycan
Only a small percentage of microbes
Cause disease
All living organisms can be classified into three domains
Bacteria, archaea, eukarya
Animalia, plantae, and microbes
Eukaryotes, prokaryotes, and viruses
Carnivores, herbivores and omnivores
Bacteria, fungi, Protozoa
Bacteria, archaea, eukarya
not composed of cells
viruses
cell wall made of chitin
fungi
cell wall made of peptidoglycan
bacteria
cell wall made of cellulose; photosynthetic
algae
unicellular, complex cell structure lacking a cell wall
protozoa
