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: