Micro Bio Chp 2 Exam 1

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Microbiology
Chapter 2
Medical Micro Bio Kingwood Tx
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1

Which of the following is a particle found in the nucleus of an atom and that has no electrical charge?

neutron

2

Matter composed of a single type of atom is know as an ?

element

3

A stable atom has _________ in its valence shell.

8 electrons

4

Which parts of the atoms interact in a chemical reaction?

electrons

5

The outer ring in Figure 2-1 represents

an electron shell

6

The valence of an atom represents its?

ability to interact with other atoms

7

The type of bond produced when atoms share electrons equally is

a nonpolar covalent bond

8

The type of bond produced when atoms with somewhat different electronegativities share electrons is ____

a polar covalent bond

9

Which of the following types of chemical bonds do carbon atoms generally NOT form?

neither ionic nor hydrogen bonds

10

Unstable isotopes can be useful

in medical diagnosis

11

Which of the following is an INCORRECT pairing?

Hydrolysis; hydrogen bonds

12

Compounds that readily dissociate in water are

either polar or ionic

13

Which of the following is a property of water?

it has a high capacity for heat

14

An acid dissociates in water to release?

both anions and hydrogen ions

15

The reverse of a dehydration synthesis reaction is an ____ reaction.

Hydrolytic

16

A hydroxyl _____ acts as a base.

Anion

17

Which of the following is NOT a characteristic of saturated fats?

They contain at least one double bond.

18

Which of the following is NOT a characteristic of phospholipids?

they contain fatty acids that associate with water

19

Organisms use carbohydrates in all of the following ways EXCEPT

to keep membranes flexible at low temperatures

20

Nucleic acids, proteins, and complex carbohydrates are all produced by?

dehydration sysnthesis

21

Which of the following is an example of polysaccharide?

Glycogen

22

Which of the following statements about proteins is FALSE?

Their primary function is energy storage

23

All of the following are components of an amino acid EXCEPT

pentose group

24

Which of the following is found in nucleic acids?

purines

25

Hydrogen Bonds are found in all of the following EXCEPT

between phosphates in ATP

26

Tertiary and quaternary structures of proteins involves _____ bonds.

ionic, hydrogen, polar, and nonpolar covalent

27

Which of the following are examples of pyrimidines?

Cytosine & thymine

28

All of the following bases are found in RNA molecules EXCEPT

Thymine

29

The "backbone" of the DNA molecule is composed of

alternation phosphates and pentoses

30

Which of the following would NOT normally be found as a component of a cells nucleic acids?

uracil deoxyribonucleotides

31

All of the following are associated with ATP molecules EXCEPT

a long term energy supply

32

Which of the following statements concerning nucleic acids is FALSE?

the nucleic acid polymer is composed of peptide bonds

33

Which of the following is an INCORRECT pairing?

secondary structure; disulfide bridges

34

Proteins contain both acidic and basic R groups, and can therefore function as

Buffers

35

A ____ is a compound that dissolves into anions and cations in water.

Salt

36

Plant cell walls are composed of ______ held together by ________ .

polysaccharids; hydrogen bonds

37

A ______ is an arrangement of atoms found in a variety of macromolecules.

Functional group

38

Decomposition reactions are commonly _____ reactions.

Exothermic

39

Lipids found in the membranes of all eukaryotic cells are _____ .

phospholipids

40

A protein is a _________ of amino acids.

polymer

41

DNA is composed of repeating units of sugars, phosphates, and nucleic acids. This is an example of a

polymer

42

A polymer composed of a simple sugar is an ____

Starch

43

Anna is conducting an experiment using pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution and it turns green. She adds more Z, the solution remains green. These observations suggest X is ____ & Z is ______ .

a base; a buffer

44

An amine group is removed from an amino acid and bounded to a second compound to form a different amino acid. No other molecules are uses or produced. What type of reaction is likely to be involved?

The answer cannot be determined for the available information

45

Adenosine triphosphate (ATP) is a

monomer

46

Amylose is an ______ carbohydrate

polymer

47

Using a microscope you observe an amoeba moving toward a food source. This is an example of

Responsiveness

48

Which of the following is NOT a component of bacterial flagella?

Tubulin

49

Which of the following statements concerning the characteristics of life is FALSE?

Reproduction is defined as an increase in the size of an organism

50

Protein synthesis occurs in the ____ ?

ribosome

51

Which of the following bacterial cell structures plays an important role in the creation of biofilms?

both fimbriae and glycocalyces

52

Short hairlike structures used only by eukaryotic cells for movement are called ?

Cillia

53

A bacterial cell moving toward light would be an example of

positive phototaxis

54

Which of the following statements concerning prokaryotic flagella is TRUE?

Prokaryotic flagella are anchored to the cell wall by means of the basal body

55

Which of the following statements concerning pili is FALSE?

Pili are long than fimbriae and flagella

56

Which of the following may be a component of bacterial cell walls?

both lipoteichoic and mycolic acids

57

Bacterial cell walls that are resistant to drying contain:

Waxes

58

Lipid A is a component of

lipopolysaccharids

59

Bacteria of the genus Mycoplasma lack cell walls. What sort of environment do they require for survival?

Isotonic

60

Lipid soluble molecules would be expected to cross the cytoplasmic membrane by which of the following processes?

diffusion

61

ATP is expended in which of the following processes?

both active transport and group translocation

62

Which of the following statements concerning osmosis is FALSE?

during osmosis, water crosses to the side of the membrane with a lower solute concentration

63

Endospores survive a variety of harsh conditions in part because of the presence of

dipicolinic acid

64

The glycocalyx of a eukaryotic cell performs all of the following functions EXCEPT

transfer of genetic material between cells

65

Which of the following is unique to archaea?

Hami

66

The cells illustrated in Figure 3-1 are in an _____ environment

hypotonic

67

Which of the following statements concerning endocytosis and exocytosis is TRUE?

Endocytosis produces a structure called a food vesicle

68

A lipid found in prokaryotes but NOT in eukaryotes is ____

Steriod

69

Which the following statements concerning centrioles is FALSE?

Centrioles are found in all organisms except prokayotes

70

Which of the following is classified as a non membranous organelle of eukaryotic cells?

centriole

71

Which of the following is associated with the mitochondria of a eurkaryotic cell

cristae

72

Which of the following statements about the endoplasmic reticulum (ER) is correct?

The ER is a transport system within the cytoplasm

73

Which of the following organelles is responsible for producing most of the ATP in a eukaryotic cell?

mitochondria

74

Chloroplasts differ from mitochondria in that the former have

thylakoids

75

Which of the following is paired Incorrectly?

algae; glycocalyx present

76

Which of the following statements concerning the endosymbiotic theory is FALSE?

eukaryotes were formed from the union of small anaerobic cells by larger aerobic cells

77

Which of the following is NOT a function of the eukaryotic cytoskeleton?

packages cellular secretions

78

The accumulation of glucose 6-phosphate inside a bacterial cell via phosphorylation of glucose is an example of

group translocation

79

Which of the following molecules would be expected to cross the cytoplasmic membrane rapidly and without the use of transport proteins?

small hydrophobic molecules only

80

Which of the following processes requires a carrier protein?

both facilitated diffusion and active transport

81

Which of the following chemical substances contributes to the unique characteristics of acid-fast bacteria?

mycolic acid

82

The cytoplasmic membranes of ______ contain phospholipids and proteins.

both bacterial and eukaryotic cells

83

Membrane rafts are found in the cytoplasmic membranes of ?

eukaryotes only

84

Endocytosis and exocytosis are means of transport used by

eukaryotes

85

Some ____ use group translocation as a means of transport.

Bacteria

86

Hopanoids are found in ____ cytoplasmic membranes.

bacterial

87

The cell walls of some _____ are composed of proteins.

archaea

88

Cytoplasmic membranes of ____ are composed of phospholipids

bacteria and eukaryotes

89

Some members of _____ have hami.

archaea

90

_____ may have pili.

Bacteria

91

Cell walls composed of polysaccharide are found in

archaea and eukaryotes only

92

Which of the following may have cell walls containing teichoic acids?

Gram positive bacteria only