Microbiology Unit 1 Test 1

1.

1 point

What is fimbriae used for?

Attachment

Reproduction

Motility

Gene Expression

2.

1 point

What structure is composed of a phospholipid bilayer?

Cytoplasm

Cell Membrane

Cell Wall

Ribosome

3.

1 point

Match the molecule with its structure. Pilus;

Pilin

Phospholipids

DNA

Flagella

4.

1 point

What percent of microbes are pathogenic?

50%

1-2%

99%

4-5%

5.

1 point

Which of the following is arranged like a chain?

Strepto

Diplo

Staphylo

Single

6.

1 point

The main component of bacterial cell walls that is made of threads composed of alternating NAG and NAM subunits is called ______?

Peptide Chains

Peptidoglycan

Glycocalyx

Cytoplasm

7.

1 point

What structure is responsible for giving the bacteria its shape?

Cytoplasm

Nucleoid Region

Cell Wall

Plasma Membrane

8.

1 point

Fimbriae is a hair-like appendage that BOTH gram positive and gram negative bacteria have for attachment.

True

False

9.

1 point

What is flagella used for?

Reproduction

Gene expression

Motility

Attachment

10.

1 point

The extracellular polymeric substance is the glycocalyx secreted by a biofilm community.

True

False

11.

1 point

A repellent is a stimulus that promotes taxis _______ itself.

Towards

Away from

12.

1 point

The pariplasm contains the cell wall and degradative enzymes and transport proteins that are secreted by the cell.

True

False

13.

1 point

In what ways are bacteria distinguished from each other?

Staining Reaction

Morphology

The Plasma Membrane

Arrangement

Nutritional Requirements

Biochemical Activities

14.

1 point

What can completely degrade peptidoglycan?

DNA

Lysozyme

Carbohydrates

Penicillin

15.

1 point

The measure of extent of pathogenicity is known as virulence.

True

False

16.

1 point

Match the molecule to its structure. Flagellin;

Pilus

Flagella

Cell Wall

Fimbrae

17.

1 point

The cell wall is thin and is located in the pariplasm between the plasma membrane and the outer membrane layer.

Gram Positive

Gram Negative

18.

1 point

What is the scientific study of disease?

Pathology

Morphology

Virulence

Etilogy

19.

1 point

Atypical cells have many cell walls.

True

False

20.

1 point

What is a loosely organized glycocalyx associated with a cell?

Capsule

Slime Layer

Extracellular Polymeric Substance

Biofilm

21.

1 point

Which of the following is arranged like a cluster?

Diplo

Single

Strepto

Staphylo

22.

1 point

Lipopolysaccharides contain:

Core Polysaccharide

O-Saccharide

Lipid A

All of the above

23.

1 point

What interferes with the peptide chains that cross link peptidoglycan strands?

Lysozyme

Penicillin

Water

Proteins

24.

1 point

An exotoxin is released from a dead bacterium.

True

False

25.

1 point

What is the smallest fundamental unit of life capable of carrying out life functions?

An Atom

A Molecule

A Cell Structure

A Cell

26.

1 point

Infectious diseases are due to factors such as genetics or lifestyle (e.g. heart disease) while non-infectious diseases are when a pathogen carries out at least part of its life cycle in a host cell.

True

False

27.

1 point

What term refers to having different appearances during different portions of their life cycles?

28.

1 point

What is the waxy component in acid-fast cell walls?

Teichoic Acid

Mycolic Acid

Peptidoglycan

Polysaccharides

29.

1 point

An attractant is a stimulus that promotes taxis ______ itself.

Towards

Away from

30.

1 point

Prokaryotic cells are generally _______ and _______ than eukaryotic cells.

larger; more complex

larger; simpler

smaller; more complex

smaller; simpler

31.

1 point

Which of the following is shaped like a rod?

Coccus/Cocci

Bacillus/Bacilli

Spirillum

Spirochete

32.

1 point

Lipid A is an ________.

Exotoxin

Endotoxin

33.

1 point

Match the molecule to its structure. Fimbriae:

Pilin

Glycocalyx

Peptidoglycan

Flagella

34.

1 point

Which of the following microbes are prokaryotic?

Bacteria, fungi, and viruses

Bacteria only

Bacteria and viruses

Viruses only

35.

1 point

The outer membrane of a gram negative cell contains which of the following?

Teichoic Acids

Lipopolysaccharides

Ribosomes

Phospholipids

Lipoproteins

36.

1 point

What is the study of the cause of disease?

Pathology

Etilogy

Virulence

Morphology

37.

1 point

In simple diffusion, materials move from a _____ concentration to a _____ concentration.

High; Low

Low; High

38.

1 point

What is taxis?

Directed motility

Protein synthesis

The making of ATP

Cell reproduction

39.

1 point

Teichoic acids are used for reinforcement and to help anchor the cell wall to the cell membrane.

True

False

40.

1 point

Gram negative bacteria cells have a thick layer of peptidoglycan and teichoic acids for reinforcement.

True

False

41.

1 point

What are disease-causing organisms able to overcome host defenses?

42.

1 point

What structure regulates what enters and exits the cell?

Cell Membrane

Capsule

Flagella

Cytoplasm

43.

1 point

What is a secreted carbohydrate and protein that surrounds the cell and can be a virulence factor, can prevent phagocytosis, and help the cell to adhere for colonization?

Teichoic Acid

Glycocalyx

Pariplasm

Peptidoglycan

44.

1 point

A living entity that is frequently too small to be seen with the naked eye is called a microbe.

True

False

45.

1 point

Which of the following are common to prokaryotic and eukaryotic cells?

Both are found in plants and animals

Both use DNA as the genetic molecule

Have a nucleus to contain the DNA

Have semipermeable plasma membranes

Contain similar organic molecules

46.

1 point

What is the space between the 2 membranes of a gram negative cell?

Pariplasm

Cytoplasm

Peptidoglycan

Peptide Chains

47.

1 point

Which of the following is shaped like a sphere?

Coccus/Cocci

Vibrio

Spirillum

Bacillus/Bacilli

48.

1 point

A capsule is a well-organized glycocalyx around a cell.

True

False

49.

1 point

What does pathogenic mean?

Inhibits spreading of a disease

Cures a disease

A specific type of disease

Able to cause a disease

50.

1 point

Penicillin will only affect growing cells, not ones that already exist.

True

False