Microbiology Quizzes Ch. 5 & 6

Prophages can be activated into viral replication and enter the lytic cycle.

A. True B. False A.

The poliovirus was successfully cultivated in a lab within the United States.

A. True B. False A.

Viral replication can involve the copying of RNA in an RNA virus.

A. True B. False A.

Viral spikes are inserted into the host cell membrane before budding or exocytosis occurs.

A. True B. False A.

Bacteriophages do not undergo adsorption to specific host cell receptors prior to penetration.

A. True B. False B.

No cases of variant Creutzfeldt-Jakob syndrome linked to eating infected cows have occurred in the United States.

A. True B. False B.

Plankton are floating communities of helminths.

A. True B. False B.

Protozoan genera are extremely difficult to tell apart. Successful classification of protozoan requires DNA sequencing.

A. True B. False B.

Chromosomes are not visible in the nucleus unless the cell is undergoing nuclear division.

A. True B. False A.

PrP SC is the infectious prion that causes spontaneous abnormal folding resulting in vCJD.

A. True B. False A.

Organelles found in algae but not found in protozoa or fungi are the

A. mitochondria. B. lysosomes. C. chloroplasts. D. endoplasmic reticulum. E. Golgi apparatus. C.

When buds remain attached, they form a chain of yeast cells called

A. molds. B. pseudohyphae. C. dimorphic. D. septa. E. mycelium. B.

All of the following are found in some or all protozoa except

A. motility. B. heterotrophic nutrition. C. formation of a cyst stage. D. ectoplasm and endoplasm. E. cell walls. E.

Viruses that consist of only a nucleocapsid are considered

A. naked viruses. B. incomplete viruses. C. complex viruses. D. simple viruses. E. viroids. A.

Which body system is mainly affected by Creutzfeldt-Jakob disease?

A. nervous system B. digestive system C. genitourinary system D. circulatory system E. respiratory system A.

Which of the following viral types enter animal cells via fusion with the animal cell membrane?

A. nonenveloped viruses B. enveloped viruses C. All of these choices are correct. D. naked viruses B.

Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?

A. Lysosomes B. Chloroplasts C. Golgi apparatus D. Endoplasmic reticulum E. Mitochondria E.

Which of the following is a type of cytopathic effect?

A. All of these choices are correct. B. rounding of cells C. multinucleated giant cells D. inclusions in the cytoplasm E. inclusions in the nucleus A.

A mold is observed to have asexual conidia, sexual spores within a sac, and septate hyphae. It is most likely classified in the

A. Basidiomycota. B. Deuteromycota. C. Zygomycota. D. Ascomycota. E. Fungi Imperfecti. D.

Which structure or molecule is not found in the cell nucleus?

A. DNA B. Golgi apparatus C. Chromatin D. Nucleolus B.

Which organelle is a stack of flattened, membranous sacs that functions to receive, modify, and package proteins for cell secretion?

A. Endoplasmic reticulum B. Golgi apparatus C. Lysosomes D. Mitochondria E. Chloroplasts B.

Which organelle/cell component would be the least useful to distinguish a particular eukaryotic group?

A. Flagella B. Cell wall C. Mitochondria D. Chloroplast C.

Which of the following are present in viruses?

A. Flagella B. Pigments C. None of the choices are correct. D. Endoplasmic reticulum E. Mitochondria C.

The endosymbiotic theory says that precursor eukaryotic cells acquired mitochondria by endosymbiosis with a/an __________ ancestor, and others gained photosynthetic ability from endosymbiosis with a/an __________ ancestor.

A. None of the choices are correct. B. rickettsia, cyanobacteria C. protozoan, algae D. helminth, algae E. archaea, cyanobacteria B.

Which pair of algae is mismatched?

A. Phaeophyta - brownalgae B. Pyrrophyta -euglenids C. Rhodophyta - redseaweed D. Chlorophyta - green algae B.

Which of the following represents a virus family name?

A. Picornavirus B. Herpesviridae C. Herpes simplexvirus D. Enterovirus E. Hepatitis B virus B.

Which group of protozoans are generally nonmotile?

A. Sarcodina B. Ciliophora C. Apicomplexa D. Mastigophora C.

Which of the following is not a possible outcome of a transport vesicle arriving at the Golgi apparatus?

A. The contents of the vesicles are targeted to the lysosome. B. The contents of the vesicle are degraded by digestive enzymes in the Golgi apparatus. C. Lipids are added to the proteins in the vesicle. D. The contents of the vesicle are repackaged into a secretory vesicle. B.

What do zygospores, ascospores, and basidiospores have in common?

A. They are found only in molds. B.All of the choices are correct. C. They are sexual spores. D. They are types of conidia. E. They are enclosed in a sac. C.

Select the FALSE statement about viruses.

A. Viruses are the most numerous microbes on Earth. B. Viruses have impacted the evolution of all other cellular life-forms including bacteria, achaeans, and eukaryotes. C. Cellular life-forms most likely preceded the origin of viruses since viruses need host cells in which to develop and reproduce. D. When viruses are treated in a way that prevents them from entering host cells and reproducing, they are said to be dead. D.

Which of the following spores are produced within a sac?

A. Zygospores B. Chlamydospores C. Blastospores D. Sporangiospores E. Arthrospores D.

Creutzfeldt-Jakob disease is

A. a spongiformencephalopathy of humans. B. initiated by anoncogenic virus. C. also called "Mad Cow disease". D. caused by aviroid. E. caused by achronic latent virus. A.

Host range is limited by the

A. age of the host cell. B. type of host cell receptors on cell membrane. C. size of the host cell. D. All of these choices are correct. E. type of nucleic acid in the virus. B.

Satellite viruses are

A. also called viroids. B. All of these choices are correct. C. dependent on other viruses for replication. D. the cause of spongiform encephalopathies. E. significant pathogens of plants. C.

All of the following pertain to virus envelopes except they

A. are formed by the virus utilizing parts of the host cell membrane. B. are found primarily on animal viruses. C. contain specialvirus proteins. D. are located between the capsid and nucleic acid. E. help the virus particle attach to host cells. D.

Fungal spores

A. are only produced under harmful environmental conditions. B. cannot be seen in a light microscope. C. are used to identify fungi. D. are only asexually produced. E. are produced by molds but not by yeasts. C.

Host cells of viruses include

A. bacteria. B. All of these choices are correct. C. human and other animals. D. plants and fungi. E. protozoa and algae. B.

Cilia are found in certain

A. bacteria. B. algae. C. All of the choices are correct. D. fungi. E. protozoa. E.

The virus-induced, specific damage to the host cell that can be seen in a light microscope is called

A. budding. B. plaques. C. cytopathic effect. D. lysogeny. E. pocks. C.

In eukaryotic cells, the structure primarily responsible for the adherence of cells to surfaces in the environment and the formation of biofilms is the

A. cell wall. B. glycocalyx. C. flagella. D. cilia. E. cell membrane. B.

The cell's series of tunnel-like membranes functioning in transport and storage are the

A. chloroplasts. B. Golgi apparatus. C. mitochondria. D. endoplasmic reticulum. E. lysosomes. D.

In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

A. cytoplasm; nucleus B. cytoplasm; cell membrane C. nucleus; cytoplasm D. nucleus; endoplasmic reticulum E. cell membrane; cytoplasm C.

Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called

A. delta agents. B. oncogenic. C. latent. D. viroids. E. prions. C.

The viral _____ is responsible for introducing the viral DNA or RNA into the cell.

A. envelope B. bacteria C. both capsid and envelope D. DNA E. capsid C.

Which of the following is not associated with every virus?

A. genomic information B. capsomers C. nucleic acid D. envelope E. capsid D.

Fungi are similar to plants in that both

A. have a cell wall. B. use carbon dioxide as an energy source. C. contain chloroplasts. D. perform photosynthesis. A.

T-even phages

A. infect Escherichia coli cells. B. include the pox viruses. C. All of these choices are correct. D. have helical capsids. E. enter host cells by engulfment. A.

The smooth endoplasmic reticulum functions in synthesis of

A. lipids. B. glucose. C. proteins. D. nucleic acids. E. glycogen. A.

When a eukaryotic cell is not undergoing mitosis, the DNA and its associated proteins appear as a visible thread-like mass called the

A. nucleoplasm. B. nucleolus. C. chromatin. D. nucleosome. E. nuclear envelope. C.

Viral cultivation is used for

A. observing the effects of viral infection on host cells. B. All of these choices are correct. C. diagnosis of viral infections. D. producing adequate numbers of viruses for research purposes. E. preparation of vaccines. F. studying the viral life cycle within host cells B.

Noncellular infectious protein particles are called

A. spikes. B. oncogenic viruses. C. prions. D. phages. E. viroids. C.

The nucleocapsid is composed of

A. the envelope, nucleic acid, and capsid. B. the envelope and capsid. C. the nucleic acid of the virus only. D. the capsomers assembled into the capsid. E. the nucleic acid along with the capsid. E.

The descriptive groupings of virus into categories such as icosahedral and helical are based on

A. the presence or absence of an envelope. B. the mechanism of entry into host cells. C. the shape of the nucleocapsid. D. the type of nucleic acid. C.

The sexually mature life cycle stage of helminths occurs in the

A. transport host. B. secondary host. C. intermediate host. D. definitive host. D.