Micro 5/6
Viruses A. Cannot be seen in a light microscope B. Are prokaryotic C. Contain 70S ribosomes D. Undergo binary fission E. All of the choices are correct
A. Cannot be seen in a light microscope
In humans, helminthes generally infect the A. Digestive tract B. Urinary tract C. Nervous system D. Muscular system E. Skin
A. Digestive tract
Fungi that grow as yeast at one temperature but will grow as mold at another temperature are called A. Dimorphic B. Saprobes C. Pseudohyphae D. Spores E. Parasites
A. Dimorphic
Which of the following is not associated with every virus? A. Envelope B. Capsomeres C. Capsid D. Nucleic acid E. Genome
A. Envelope
Amoebic dysentery is most commonly contracted through the A. Fecal oral route from contaminated food or water B. Direct transmission from one host to another C. Puncture wounds D. Insect bites E. None of the choices are correct
A. Fecal oral route from contaminated food or water
Which of the following does not pertain to helminths? A. In kingdom Protista B. Parasitic worms C. Eggs and sperm used for reproduction D. Often alternate hosts in complex life cycles E. Have various organ systems
A. In kingdom Protista
Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found? A. Mitochondria B. Lysosomes C. Golgi apparatus D. Chloroplasts E. Endoplasmic reticulum
A. Mitochondria
The eukaryotic cell's glycocalyx is A. Mostly polysaccharide B. The site where many metabolic reactions occur C. Also called the cell wall D. Composed of many diverse proteins E. Protection against osmotic lysis
A. Mostly polysaccharide
Viruses with _____ sense RNA contain the correct message for translation, while viruses with _____ sense RNA must first be converted into a correct message. A. Positive, negative B. Negative, positive C. Primary, secondary D. Secondary, primary E. None of the choices are correct
A. Positive, negative
Cell walls are not found on typical cells of A. Protozoa B. Algae C. Fungi D. Bacteria E. All of the choices are correct
A. Protozoa
Cilia are found in certain A. Protozoa B. Algae C. Fungi D. Bacteria E. All of the choices are correct
A. Protozoa
When buds remain attached, they form a chain of yeast cells called A. Pseudohyphae B. Septa C. Molds D. Dimorphic E. Mycelium
A. Pseudohyphae
Most fungi obtain nutrients from dead plants and animals. These fungi are called A. Saprobes B. Parasites C. Substrates D. Nonseptate E. Dimorphic
A. Saprobes
The group of protozoa that use pseudopodia to move are the A. Sarcodina B. Ciliophora C. Mastigophora D. Apicomplexa E. None of the choices are correct
A. Sarcodina
Biologists have found evidence that eukaryotic cells evolved from prokaryotic organisms by a process of intracellular A. Symbiosis B. Parasitisim C. Communalism D. None of the choices are correct
A. Symbiosis
Which of the following is not a typical capsid shape? A. Tetrahedral B. Complex C. Helical D. Icosahedron E. All of the choices are capsid shapes
A. Tetrahedral
Chloroplasts are composed of membranous sacs called _____ that carry chlorophyll. Surrounding these sacs is a ground substance called _____. A. Thylakoids, stroma B. Granna, stroma C. Cristae, stroma D. Cristae, matrix E. Thylakoid, matrix
A. Thylakoids, stroma
The motile, feeding stage of protozoa is called the A. Trophozoite B. Cyst C. Sporozoite D. Oocyst E. Food vacuole
A. Trophozoite
Protists include A. Yeasts and molds B. Algae and protozoa C. Helminths D. All of the choices are correct E. None of the choices are correct
B. Algae and protozoa
Viral spikes A. Are always present on enveloped viruses B. Bind viral capsid and envelope together C. Allow bacteria to evade host defenses D. Are derived from host proteins E. All of the choices are correct
B. Bind viral capsid and envelope together
A _____ is the protein shell around the nucleic acid core of a virus. A. Capsomere B. Capsid C. Spike D. Envelope E. Monolayer
B. Capsid
During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a/an A. Endospore B. Cyst C. Seed D. Trophozoite E. Sporozoa
B. Cyst
Which of the following represents a virus family name? A. Herpes simplex virus B. Herpesviridae C. Picornavirus D. Enterovirus E. Hepatitis B virus
B. Herpesviridae
A _____ originates from the golgi apparatus as one type of vesicle that contains a variety of enzymes for intracellular digestion. A. Perixosome B. Lysosome C. Magneto some D. Inclusion E. Ribosome
B. Lysosome
Viruses have all the following except A. Definite shape B. Metabolism C. Genes D. Ability to infect host cells E. Ultramicroscopic size
B. Metabolism
There are nine peripheral pairs and one central pair of _____ found inside eukaryotic flagella and cilia. A. Filaments B. Microtubules C. Flagella D. Cilia E. None of the choices are correct
B. Microtubules
Protozoan endoplasm contains A. Ectoplasm B. Mitochondria C. Flagella D. Oral groves E. None of the choices are correct
B. Mitochondria
The site for ribosomal RNA synthesis is the A. Ribosome B. Nucleolus C. Nucleus D. Golgi apparatus E. Lysosome
B. Nucleolus
Which is not a characteristic of fungi? A. Cells have cell walls B. Photosynthetic C. Include single-celled and filamentous forms D. Heterotrophic nutrition E. Can use a wide variety of nutrients
B. Photosynthetic
Larval development of helminths occurs in which host? A. Primary host B. Secondary host C. Definitive host D. Transport host E. Mating takes place in all hosts
B. Secondary host
Pfiesteria is a/an A. Toxic fungus B. Toxic algae C. Toxic heminth D. Toxic protozoan E. Bacterial endospore
B. Toxic algae
Protists with contractile vacuoles A. Are algae B. Use them to expel excess water from the cell C. Typically live in salty seawater D. Use them for motility E. All of the choices are correct
B. Use them to expel excess water from the cell
Which of the following is not a viral order in the classification system? A. Caudovirales B. Vaccinia virus C. Nidovirales D. Mononegavirales E. All of the choices are viral orders
B. Vaccinia virus
The correct sequence of events in viral multiplication is A. Penetration, uncoating, synthesis, adsorption, assembly, release B. Uncoating, penetration, synthesis, assembly, absorption, release C. Adsorption, penetration, uncoating, synthesis, assembly, release D. Assembly, synthesis, uncoating, release, penetration, adsorption E. Adsorption, release, synthesis, uncoating, assembly, penetration
C. Adsorption, penetration, uncoating, synthesis, assembly, release
Protozoan cysts A. Are part of all protozoan life cycles B. Are necessary for transmission to a new host C. Are analogous to bacterial endospores D. Are the primary form of replication E. All of the choices are correct
C. Are analogous to bacterial endospores
Virus capsids are made from subunits called A. Envelopes B. Spikes C. Capsomeres D. Prophages E. Peplomers
C. Capsomeres
In eukaryotic cells, ribosomes have two locations: scattered in the _____ and on the surface of _____. A. Cytoplasm, golgi apparatus B. Nucleus, golgi apparatus C. Cytoplasm, endoplasmic reticulum D. Cytoplasm, golgi apparatus E. Nucleus, endoplasmic reticulum
C. Cytoplasm, endoplasmic reticulum
Chitin is a chemical component of the cell walls of A. Protozoa B. Algae C. Fungi D. Bacteria E. All of the choices are correct
C. Fungi
An organelle that is a stack of flattened, membranous sacs and functions to receive, modify and package proteins for cell secretion is the A. Mitochondria B. Lysosomes C. Golgi apparatus D. Chloroplasts E. Endoplasmic reticulum
C. Golgi apparatus
Larvae and eggs are developmental forms of A. Protozoa B. Algae C. Helminthes D. Fungi E. None of the choices are correct
C. Helminthes
The long, thread-like branching cells of molds are called A. Conidiophores B. Pseudohyphae C. Hyphae D. Septate E. Ascus
C. Hyphae
One of the principal capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a(n) _____ capsid. A. Spiked B. Complex C. Icosahedral D. Helical E. Buckeyball
C. Icosahedral
The group of protozoa that have flagella are the A. Sarcodina B. Ciliophora C. Mastigophora D. Apicomplexa E. None of the choices are correct
C. Mastigophora
The eukaryotic cell organelle that most resembles a bacterial cell is the A. Nucleus B. Golgi apparatus C. Mitochondria D. Lysosome E. Ribosome
C. Mitochondria
Filamentous fungi are called A. Pseudohyphae B. Septa C. Molds D. Dimorphic E. Mycelium
C. Molds
Which of the following is not a function of the eukaryote glycocalyx? A. Protection B. Adherence C. Movement D. Reception of chemical signals E. All of the choices are functions
C. Movement
A naked virus only has a(n) A. Capsid B. Capsomere C. Nucleocapsid D. Envelope E. Antigenic surface
C. Nucleocapsid
What two categories of fungi cause human diseases? A. Primary and secondary B. Primary and vegetative C. Opportunistic and primary D. Secondary and opportunistic E. Vegetative and reproductive
C. Opportunistic and primary
Eating undercooked meat can lead to food poisoning and helminthic infection. What is the common host for Taenia solium? A. Geese B. Ducks C. Pigs D. Cows
C. Pigs
After returning from a trip to Africa, Tom begins to feel very tired and weak. He has severe anemia. A blood smear reveals a protozoan is present in his blood. The health care provider tells Tom he has malaria. Which of the following could be the causative agent of his disease? A. HIV B. T. solium C. Plasmodium malariae D. Trichophyton
C. Plasmodium malariae
The passageways in the nuclear envelope for movement of substances to and from the nucleus and cytoplasm are called nuclear A. His tones B. Chromatin C. Pores D. Endoplasmic reticulum E. Inclusions
C. Pores
The endosymbiotic theory says that precursor eukaryotic cells acquired flagella by endosymbiosis with a _____ ancestor and others gained photosynthetic ability from endosymbiosis with a _____ ancestor. A. Protozoan, algae B. Archaea, cyanobacteria C. Spirochete, cyanobacteria D. Helminth, algae E. None of the choices are correct
C. Spirochete, cyanobacteria
A negative RNA virus must first A. Synthesize a DNA copy of its genome B. Synthesize a negative RNA copy of its genome C. Synthesize a positive RNA copy of its genome D. Transcribe reverse transcriptase E. Transcribe RNA polymerase
C. Synthesize a positive RNA copy of its genome.
All of the following are helminths except A. Pinworms B. Flukes C. Trypanosomes D. Roundworms E. Tapeworms
C. Trypanosomes
The group of protozoa that are not mobile are the A. Sarcodina B. Ciliophora C. Mastigophora D. Apicomplexa E. None of the choices are correct
D Apicomplexa
The eukaryote cell membrane is composed of A. Sterols B. Proteins C. Phospholipids D. All of these E. Only sterols and phospholipids
D. All of these
Classification of viruses into families involves determining all the following characteristics except A. Type of nucleic acid B. Type of capsid C. Presence of an envelope D. Biochemical reactions E. Number of strands in the nucleic acid
D. Biochemical reactions
Helical and icosahedral are terms used to describe the shapes of a virus A. Spike B. Capsomere C. Envelope D. Capsid E. Core
D. Capsid
Which organelle is found in algae but not found in protozoa or fungi? A. Mitochondria B. Lysosomes C. Golgi apparatus D. Chloroplasts E. Endoplasmic reticulum
D. Chloroplasts
Adulthood and mating of helminths occur in which host? A. Primary host B. Secondary host C. Definitive host D. Transport host E. Mating takes place in all hosts
D. Definitive host
Mitochondria possess all of the following except A. Enzymes for metabolism B. Cristae C. Electron transport chain proteins D. Enzymes for photosynthesis E. 70S ribosomes (prokaryote)
D. Enzymes for photosyntesis
The endosymbiotic theory has been developed to explain the emergence of A. Archea B. Bacteria C. Prokaryotes D. Eukaryotes E. None of the choices are correct
D. Eukaryotes
In eukaryotic cells, which of the following contains DNA? A. Nucleus, mitochondria, Golgi apparatus B. Nucleus, endoplasmic reticulum, Golgi apparatus C. Nucleus, nucleolus, Golgi apparatus D. Nucleus, chloroplast, mitochondria E. Nucleus, chloroplast, peroxisome
D. Nucleus, chloroplast, mitochondria
Which is mismatched? A. Giardia-transmitted by feces in drinking water B. Histoplasma-causes Ohio Valley fever C. Trichomonas-sexually transmitted D. Plasmodium-causes Chagas disease E. Trypanosomes -causes African sleeping sickness
D. Plasmodium-causes Chagas disease
Histones are A. Found in polyribosomes B. Enzymes found in lysosomes C. Proteins of the cytoskeleton D. Proteins associated with DNA in the nucleus E. On the surface of rough endoplasmic reticulum
D. Proteins associated with DNA in the nucleus
The vector for the trypanosome of Chagas disease is the A. Mosquito B. Deer tick C. Tse-tse fly D. Reduviid bug E. Nematode
D. Reduviid bug
Under extreme conditions some bacilli go into a dormant, non-vegetative state called__ formation. A. ciliated B. cytoplasmic streaming C. ameobiod D. endospore
D. endospore
The size of a eukaryotic cell ribosome is A. 30S B. 40S C. 50S D. 70S E. 80S
E. 80S
All of the following are helminths except A. Tapeworms B. Flukes C. Flatworms D. Round worms E. All of the choices are helminthes
E. All of choices are helminthes
Host cells of viruses include A. Human and other animals B. Plants and fungi C. Bacteria D. Protozoa and algae E. All of the choices are correct
E. All of the choices are correct
The cytoskeleton A. Anchors organelles B. Provides support C. Functions in movements of the cytoplasm D. Helps maintain cell shape E. All of the choices are correct
E. All of the choices are correct
Viral nucleic acids include which of the following A. Double stranded DNA B. Single stranded DNA C. Double stranded RNA D. Single stranded RNA E. All of the choices are correct
E. All of the choices are correct
Which of the following is found in eukaryotic cells but not in prokaryotic cells? A. Nucleus B. Mitochondria C. Endoplasmic reticulum D. Lysosomes E. All of the choices are correct
E. All of the choices are correct
Blooms of certain alga are associated with all of the following except A. Paralytic shellfish poisoning B. Red tides C. Ciguatera D. Pfiesteria piscicida E. Amoebic dysentery
E. Amoebic dysentery
Fungal asexual spores A. Are only produced under harmful environmental conditions B. Are only asexually produced C. Cannot be seen in a light microscope D. Are produced by molds but not by yeasts E. Are used to identify fungi
E. Are used to identify fungi
All of the following are found in some or all protozoa except A. Motility B. Ectoplasm and endoplasm C. Heterotrophic nutrition D. Formation of a cyst stage E. Cell wall
E. Cell wall
When a eukaryotic cell is not undergoing mitosis, the DNA and its associated proteins appear as a visible thread-like mass called the A. Nuclear envelope B. Nucleosome C. Nucleolus D. Nucleoplasm E. Chromatin
E. Chromatin
Eukaryotic flagella differ from prokaryotic flagella because only eukaryotic flagella A. Are used for cell motility B. Facilitate chemo taxis C. Facilitate photo taxis D. Are long whip-like structures E. Contain microtubules
E. Contain microtubules
The core of every virus particle always contains A. DNA B. Capsomeres C. Enzymes D. DNA and RNA E. Either DNA or RNA
E. Either DNA or RNA
The cell's series of tunnel-like membranes functioning in transport and storage are the A. Mitochondria B. Iysosomes C. Golgi apparatus D. Chloroplasts E. Endoplasmic reticulum
E. Endoplasmic reticulum
All of the following pertain to virus envelopes except A. Gained as a virus leaves the host cell membrane B. Gained as a virus leaves the nuclear membrane C. Contain special virus proteins D. Help the virus particle attach to host cells E. Located between the capsid and nucleic acid
E. Located between the capsid and nucleic acid
Which of the following is not true of the cytoskeleton? A. Structural framework for the cell B. Anchor points for organelles C. Made up of microfilaments D. Made up of microtubules E. Made up of cilia
E. Made up of cilia
The woven, intertwining mass of hyphae that makes up the body of a mold is a/an A. Septum B. Rhizoid C. Spore D. Bud E. Mycelium
E. Mycellum
Reverse transcriptase synthesizes A. The positive RNA strand from a negative RNA strand B. A negative RNA strand from a positive RNA strand C. Viral RNA from DNA D. Viral DNA from RNA E. None of the choices are correct
E. None of the choices are correct
Parasitic worms have a highly developed ______ system. A. Digestive B. Nervous C. Respiratory D. Muscular E. Reproductive
E. Reproductive
Algae are classified into Divisions based principally on their type of motility. True or False.
False
All fungi cause some kind of disease in plants and animals. True or False.
False
All fungi have hyphae. True or False.
False
In humans, fungi can only infect the skin. True or False
False
Plankton are floating communities of helminths. True or False.
False
The cell wall of fungi and algae are chemically identical to the prokaryotic cell wall. True or False.
False
The eukaryotic cell membrane is a bilayer of sterols. True or False.
False
The nuclear envelope is a single layer. True or False.
False
There are no algae that can cause human disease. True or False.
False
All algae have chloroplasts. True or False.
True
Chromosomes are generally not visible in the nucleus unless the cell is undergoing nuclear division. True or False
True
Eukaryotic mitochondria have their own 70S ribosomes and circular DNA. True or False.
True
Fungi can reproduce both sexually and asexually. True or False.
True
Infections caused by fungi are called mycoses. True or False.
True
Rough endoplasmic reticulum is studded with ribosomes. True or False.
True