BSC2000

Question 1

Which of the following are boundary structures for a eukaryotic cell?

Answer 1

cell wall

cytoplasmic membrane

Question 2

Identify a few benefits of cells being motile.

Answer 2

Attraction to nutrients

Predator avoidance

Chemical avoidance

Question 3

Eukaryotes traditionally studied by microbiologists include the protozoa, helminths, and microscopic algae and

Answer 3

microscopic fungi

Question 4

The compact sphere that is the most prominent organelle of eukaryotic cells is called the ______.

Answer 4

nucleus

Question 5

Which is a membrane-bound organelle that contains digestive enzymes?

Answer 5

Lysosome

Question 6

Endosymbiosis is the idea that mitochondria and chloroplasts originated when one cell type ______.

Answer 6

engulfed another cell type

Question 7

The ______ are a group of heterotrophic organisms with cell walls of chitin. Most species grow as multicellular filaments called hyphae.

Answer 7

fungi

Question 8

Which of the following terms describes organisms that acquire energy from organic substrates?

Answer 8

Heterotrophs

Question 9

A simple pinworm infection that typically does not spread beyond the intestine is called

Answer 9

enterobiasis

Question 10

What describes a worm having both male and female organs?

Answer 10

Hermaphroditic

Question 11

Helminth infections are very rare in North America.

Answer 11

False

Question 12

Glycocalyx
Cytoplasmic
Actin filaments

Answer 12

External
Boundary
Internal

Question 13

The cytoplasmic membrane is a bilayer of Blank______ in which Blank______ are embedded.

Answer 13

phospholipids; proteins

Question 14

The structure that is observable on moldy bread is actually an intertwining mass of hyphae called a(n)

Answer 14

mycelia

Question 15

Which is generally the most prominent organelle in a eukaryotic cell?

Answer 15

nucleus

Question 16

Enterobiasis is an infection caused by which helminth?

Answer 16

pinworm

Question 17

Helminth infections in North America are estimated to be in the Blank______.

Answer 17

millions

Question 18

Sporangiospores are formed by successive cleavages within a sac-like head called a Blank______.
.

Answer 18

sporangium

Question 19

Most protozoa are_____ humans.

Answer 19

harmless to

Question 20

The clear outer layer of cytoplasm found in many protozoa is called the

Answer 20

ectoplasm

Question 21

The woven, intertwining mass of hyphae that makes up the body or colony of a mold is called a

Answer 21

mycelium

Question 22

Sarcodina
Ciliophora
Mastigophora
Sporozoa

Answer 22

Move with pseudopods
Use cilia for movement
Use flagella for movement
Have gliding motility

Question 23

Which are helminths?

Answer 23

Tapeworms

Flukes

Roundworms

Question 24

In pathogenic helminths, the most developed organs are those of the reproductive system.

Answer 24

True

Question 25

Which are the four groups of protozoans?

Answer 25

mastigophora ciliophora sporozoa sarcodina

Question 26

what is involved in involved in locomotion, feeding, and protection, in protozoans

Answer 26

ectoplasm

Question 27

granular inner layer of the cytoplasm.

Answer 27

endoplasm

Question 28

located between the inner cytoplasmic membrane and the outer membrane in bacterial cells.

Answer 28

Periplasm

Question 29

The term _____ refers to the rough endoplasmic reticulum.

Answer 29

ergastoplasm

Question 30

Which of the following eukaryotes are traditionally studied by microbiologists

Answer 30

microscopic algae helminths protozoa microscopic fungi

Question 31

The cytoskeleton is composed of

Answer 31

various proteins including tubulin and actin

Question 32

Hyphae are long, threadlike cells found in the bodies of____of the filamentous type.

Answer 32

Fungi

Question 33

Viruses are classified based on genetic makeup, chemical composition, and

Answer 33

structure

Question 34

Fill in the blank question. The sum total of the genetic information carried by a virus is called the viral

Answer 34

genome

Question 35

Masses of viruses or damaged organelles of a cell due to a cytopathic effect of viral infection are called ______ bodies

Answer 35

inclusions

Question 36

_____infections, when the cell harbors a virus and is not immediately lysed, can last from a few weeks to the remainder of the host's life.

Answer 36

Persistant

Question 37

The category of DNA phages that can participate in a lytic phase or enter into a lysogenic cycle is

Answer 37

temperate phages

Question 38

The interior of eggs normally contains nonpathogenic bacterial cells but no viruses.

Answer 38

False. The interior of eggs is normally a sterile environment and free from any type of microbes or viruses.

Question 39

Which of the following describes the various viral "parts" coming together to produce virus particles?

Answer 39

assembly

Question 40

Some laboratory animals can propagate viruses in the laboratory more readily than others because many viruses exhibit host

Answer 40

specificity

Question 41

A clear area where virus-infected monolayers of cells have been disrupted or destroyed is called a(n)

Answer 41

plaques

Question 42

Most human viral infections are

Answer 42

Self Limiting; Most viral infections are resolved through the actions of the immune system that targets the viral invaders for destruction.

Question 43

When a cell harbors a virus that is not immediately lysing the cell, it's known as what type of infection?

Answer 43

persistent

Question 44

Mature virus particles are constructed from nucleic acid and protein during the______phase of the viral life cycle.

Answer 44

assembly

Question 45

Active infection

Answer 45

the virus is causing damage to host tissues.

Question 46

The nutritional type of a specific microbe is determined by its sources of

Answer 46

Carbon and energy

Question 47

Which microorganism uses inorganic chemicals for energy and carbon dioxide for carbon?

Answer 47

Chemoautotroph

Question 48

Which of the following are essential nutrients for microbes?

Answer 48

Carbon Hydrogen Oxygen Nitrogen Phosphate Sulfur (CHONPS)

Question 49

Which cell structure regulates the passage of substances into and out of the cell?

Answer 49

Cytoplasmic membrane

Question 50

Which of the following environmental factors are likely to have the greatest influence on microbial growth?

Answer 50

Gases such as carbon dioxide and oxygen pH Pressures Temperature

Question 51

In binary fission, the doubling time of a particular microbial species is also known as its _____time

Answer 51

generation

Question 52

A graphical representation of the change in population size over time is called a(n)_______curve

Answer 52

growth

Question 53

what is binary fission

Answer 53

A bacterial cell enlarges by synthesizing new cell components, duplicates its chromosome, and then starts to pull its cell envelope together in the center of the cell

Question 54

In addition to the availability of nutrients, which environmental factors influence microbes?

Answer 54

pH osmotic pressures radiation