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Multiple Choice Quiz
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1

What is not a cytoplasmic organelle present in all eucaryotic organisms?
A)Endoplasmic reticulum
B)Mitochondria
C)Cytoskeleton
D)Plasmids
E)Nucleus
2

What statement does not support the theory that mitochondria arose from an endosymbiotic relationship with bacteria?
A)Bacterial membranes surround mitochondria
B)Mitochondrial division is independent of the eucaryotic host
C)The mitochondrial chromosome contains bacterial DNA sequences
D)Mitochondrial ribosomes are 70S rather than 80S
E)Mitochondria have paired chromosomes
3

What statement regarding procaryotic and eucaryotic flagella is correct?
A)Both are the same thickness
B)The structure of both is identical
C)Both possess an external covering
D)The motion of both types is the same
E)Both function in locomotion
4

The cell walls of fungi are composed of what?
A)Peptidoglycan
B)Chitin or cellulose
C)Pectin
D)Mannans
E)Calcium carbonate
5

Why are sterols important components of eucaryotic cell membranes?
A)They provide strength and stability.
B)They are important in communication with other cells.
C)They anchor the cell membrane to the cell wall.
D)They allow the cell membrane to secrete various chemicals.
E)They serve the functions phospholipids serve in procaryotic cell membranes.
6

Where does rRNA synthesis in eucaryotes occur?
A)Nucleus
B)Mitochondria
C)Golgi apparatus
D)Nucleolus
E)Glycocalyx
7

Asexual reproduction in microscopic eucaryotes occurs by what process?
A)Binary fission
B)Meiosis
C)Nuclear fusion
D)Mitosis
E)Chromatin condensation
8

Which of the following eucaryotic organelles originates from the outer membrane of the nuclear envelope and allows for the transportation of materials from the nucleus to the cytoplasm, and ultimately to the cell's exterior?
A)Golgi apparatus
B)Cisternae
C)Endoplasmic reticulum
D)Polyribosomes
E)Mitochondria
9

Where is the site for protein modification in eucaryotes?
A)Rough endoplasmic reticulum
B)Golgi apparatus
C)Smooth endoplasmic reticulum
D)Nucleus
E)Lysosome
10

Which of the following defines a lysosome?
A)A vesicle that originates from the Golgi apparatus and contains a variety of enzymes
B)A membrane-bound sac containing fluids or solid particles to be digested
C)A vacuole that contains reserve nutrients
D)A vacuole that regulates osmotic pressure
E)A vesicle that is important in the enlargement and repair of the cell wall and cytoplasmic membrane
11

Where are the enzymes and electron carriers of aerobic respiration located in eucaryotes?
A)Golgi apparatus
B)Matrix of the mitochondria
C)Chloroplasts
D)Cristae of the mitochondria
E)Cytoplasmic membrane
12

Which of the following is incorrect regarding chloroplasts?
A)They are the primary producers of organic nutrients.
B)They are found in algae and plant cells.
C)They reside in cells that undergo aerobic respiration.
D)Oxygen gas is produced as a by-product of their activities.
E)They convert the energy of sunlight into chemical energy through photosynthesis.
13

What is not a function of the cytoskeleton?
A)Anchor organelles
B)Provide cellular support
C)Permit eucaryotes to change shape
D)Permit cellular movement
E)Synthesize proteins
14

Filamentous fungi form long, threadlike extensions known as what?
A)Pseudohypha
B)Buds
C)Hypha
D)Sporangiospores
E)Mycelium
15

All fungi utilize what as a nutritional substrate?
A)Organic nutrients
B)Carbon dioxide
C)Sunlight
D)Inorganic ions
E)Nitrogen gas
16

Germination of an asexual mole spore initially involves the production of what structure?
A)Septate hyphae
B)Germ tube
C)Vegetative hyphae
D)Rhizoids
E)Nonseptate hyphae
17

What is formed when hyphae of two opposite fungal strains fuse and form diploid spores?
A)Sporangium
B)Conidia
C)Basidiospores
D)Zygospores
E)Ascospores
18

Fungi are identified by which of the following characteristics?
A)rRNA sequences
B)Asexual spore forming structures and spores
C)Biochemical analysis
D)Presence and type of sexual spores
E)Serological analysis
19

What statement regarding the fungi is incorrect?
A)Most are obligate parasites
B)Humans are generally resistant to fungal infections
C)Many species are pathogenic to field crops
D)Fungi decompose organic matter and return essential minerals to the soil
E)They can be used to produce large quantities of antibiotics, alcohol, organic acids, and vitamins
20

Algae are one of the main components of the large floating community of microscopic organisms known as what?
A)Molds
B)Protists
C)Colonies
D)Plankton
E)Mycelia
21

Most human illnesses caused by algae have been associated with what?
A)Consumption of algal toxins
B)Contact with algal cell walls
C)Poisoning by algal chlorophylls
D)Consumption of by-products of algal photosynthesis
E)Infestation of the lining of the gut by algal pathogens
22

Most protozoa are recognized by a motile feeding stage known as what?
A)Pseudopods
B)Cysts
C)Cirri
D)Cilia
E)Trophozoites
23

What dictates how a parasitic protozoan is transmitted to other hosts?
A)Method of reproduction
B)Life cycle
C)Composition of the cyst
D)Style of locomotion
E)Size of the organism
24

Protozoan infections are typically geographically restricted to what areas?
A)The northern hemisphere
B)The northern and southern polar caps
C)The tropics and subtropics
D)Central Europe
E)The British Isles
25

Which of the following are the primary targets of parasitic worm infections?
A)The elderly
B)Pre-school children in daycare settings
C)Anyone living in rural areas
D)Societies living in tropical areas
E)Malnourished children





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