Micro Midterm
Part of the gram-negative cell wall
Endotoxins are defined as:
All diseases are not caused by microorganisms
Koch's postulates dont apply to all diseases because:
Does not involve specific diseases
Mechanical transmission of a disease differs from biological transmission in that mechanical transmission:
Ascomycete
Ringworm is caused by a:
Coenocytic-possess cross walls
Which of the following pairs are mismatched?
Ribosomes-protein storage
Which of the following pairs is NOT correctly matched?
Mosquito-ringworm
Which of the following pairs is mismatched?
Phyrophytes-paralytic shellfish poisening
Which of the following pairs is mismatched?
They cannot produce ATP outside of a host cell
Which of the following provides the most significant support for the idea that viruses are non-living chemicals?
May be an opportunistic pathogen
A commensal bacterium:
Chemically defined medium
A culture medium consisting of ingredients which can be written as a chemical formula is a:
Acquired during the course of the hospitalization
A nosocomial infection:
A naked, infectious piece of RNA
A viroid is:
The final electron acceptors are different.
Aerobic respiration differs from anaerobic respiration in which of the following aspects?
The Limulus amoebocyte lysate test
All injectable drugs are tested for endotoxin contamination by:
Measure metabolic activity
All of the following are direct methods to measure microbial growth except:
All are true
All of the following are true about protozoans EXCEPT:
Houseflies
All of the following arthropods transmit diseases which suck blood from a human host EXCEPT:
Green algae
All of the following groups of algae produce compounds that are toxic to humans EXCEPT:
All are unicellular
All of the following statements about algae are true EXCEPT:
All fungi possess undilopodia
All of the following statements regarding fungi are true EXCEPT:
All are parasites
All of the following statements regarding helminths are true EXCEPT:
Biosynthesis
Bacteriophages and animal viruses do NOT differ significantly in which of the following?
The amount of oxygen present in a water sample
Biochemical oxygen demand (BOD) is a measure of:
Secondary sewage treatment
Choose the correct wastewater treatment for removal of BOD?
Continuous cell lines can be maintained through an indefinite number of generations
Continuous cell lines differ from primary cell lines in that:
Photoautotroph
Cyanobacteria are an example of what type of organism?
Two strands of corresponding nucleotides held by hydrogen bonds
DNA is constructed of:
Are used to transfer DNA
Fimbriae and pili differ in that pili:
36
How many total molecules of ATP can be generated from the complete oxidation of one molecule of glucose to carbon dioxide and water?
The primary structure of the protein
If you know the sequence of nucleotides within a gene, which one of the following could you determine with the most accuracy?
Chromatophores
In bacteria, photosynthetic pigments are found in:
Viruses are not composed of cells
In which of the following ways do viruses differ from bacteria?
Enter through the hair follicles and sweat ducts
Most pathogens that gain access through the skin:
Boiling food prior to consumption
Since botulism is caused by a bacterial exotoxin, it should easily be prevented by:
Kill 50% of the test population
The LD50 is a dose that will:
Buffers
The addition of which of the following to a culture medium will neutralize acids?
Uncoating
The following steps occur during the multiplication of Herpes viruses. What is the third step?
Microorganisms cause disease
The major significance of Robert Koch's work was that:
Needlestick
The most common route of accidental AIDS transmissions to health care workers is:
Mucus membrane of the respiratory tract
The most frequently used portal of entry for pathogens is the:
Epidemiology
The science that deals with when diseases occur and how they are transmitted is called:
None of the above
Three cells with generation times of 20 minutes are inoculated into a culture medium. How many cells are there after 3 hours? A. 1072 B. 1152 C. 768 D. 1244 E. None of the above
All metabolic processes.. (longest answer)
To a microbiologist, fermentation is best defined as:
Naked DNA in solution
Transformation is the transfer of DNA from a donor to a recipient bacterial cell by:
Hepadnaviridae and retroviridae
Viruses that have reverse transcriptase are in the:
Intestinal contents
What do tapeworms eat?
UGU
What would be the codon for the following amino acid sequence of ACA?
Escherichia Coli
Which of the following bacteria is responsible for the most cases of a nosocomial infection?
Botulism
Which of the following diseases is NOT spread by droplet infection?
Maintains cell shape
Which of the following is NOT a characteristic of the plasma cell membrane?
Cellulose
Which of the following is NOT a chemical component of a bacterial cell wall?
They lack membrane bound organelles.
Which of the following is NOT a distinguishing characteristic of prokaryotic cells?
In culture media
Which of the following is NOT a method of culturing viruses?
Cilia
Which of the following is NOT a structure found in prokaryotic cells?
It protects the cell in a hypotonic solution.
Which of the following is NOT true about a gram-positive cell wall?
It is used to repel itself from cell surfaces.
Which of the following is NOT true about glycocalyx?
They are sensitive to penicillin.
Which of the following is NOT true about gram-negative cell walls?
They are used for penetration
Which of the following is NOT true about viral spikes?
Viruses use their own catabolic enzymes
Which of the following is NOT true about viruses?
A used hypodermic needle
Which of the following is an example of a fomite?
They reproduce by mitosis.
Which of the following is generally NOT true of prokaryotic cells?
Secondary infection-a long-lasting illness
Which of the following is incorrect?
None of the above
Which of the following is not a reservoir of infection? -hospital -none of the above -a sick person -a sick animal
Pyruvic acid
Which of the following is not an end-product of fermentation?
Tertiary sewage treatment
Which of the following is the correct wastewater treatment for maintaining residual chlorine?
Chemotherapeutic drug intervention
Which of the following is the most effective control for malaria?
Systematic infection
Which type of infection can be caused by septicemia?
Photoheterotroph
Which type of organism has bacteriochlorophylls and uses alcohols for carbon?
Chemoheterotroph
Which type of organism uses glucose for carbon and energy?
Candida albicans
Yeast infections are caused by:
The cell has a cell wall
You have a motile, gram-positive cell with no visible nucleus. From the data presented, you can assume: