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BIO SCI 101 > Exam 4 > Flashcards

Exam 4 Flashcards

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Biology 101 flashcards
1
Q

Most of the available antimicrobial agents are effective against:

A

bacteria

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2
Q

More than half of our antibiotics are:

A

produced by bacteria

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3
Q

T/F Penicillin G was isolated from bacterium of the genus Streptomyces.

A

False

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4
Q

In what way semisynthetic and natural penicillins are alike?

A

Both have β-lactam ring in its structure

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5
Q

Which statement is correct concerning penicillin?

A

it prevents crosslinking of peptidoglycan strands

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6
Q

Which of the following organisms would MOST likely be sensitive to natural penicillin?

A

Streptococcus pyogenes

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7
Q

Which of the following antibiotics does NOT interfere with cell wall synthesis?

A

tetracycline

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8
Q

Which of the following statements is FALSE?

A

Interferon inhibits glycolysis

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9
Q

Which of the following statements about drug resistance is FALSE?

A

it is found only in gram-negative bacteria

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10
Q

Which of the following antimicrobial agents is recommended for use against fungal infections?

A

nystatin

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11
Q

Which of the following does NOT affect eukaryotic cells?

A

semisynthetic penicillins

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12
Q

What is phage therapy?

A

The use of viruses to kill bacteria

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13
Q

Which of the following statements about septicemia is FALSE?

A

It is caused by bacteria being present in the blood or lymph

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14
Q

Which of the following are Gram-positive bacteria?

A

bacillus, staphylococcus, and streptococcus

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15
Q

Which of the following pairs is mismatched?

A

Malaria – Treponema pallidum

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16
Q

Which of the following is NOT caused by a bacterium?

A

malaria

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17
Q

Human-to-human transmission of Plague is usually by:

A

the respiratory route

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18
Q

A characteristic symptom of Bubonic plague is:

A

swollen lymph nodes

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19
Q

Which of the following is NOT a zoonosis?

A

syphilis

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20
Q

Most dangerous form of anthrax infection:

A

pulmonary anthrax

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21
Q

Infection with Streptococcus pyogenes can cause all of the following EXCEPT:

A

buboes

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22
Q

Which one of the following statements about mycoplasmal pneumonia is FALSE?

A

treatment with Penicillin G

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23
Q

Tuberculosis is caused by

A

gram positive bacteria

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24
Q

All of the following can lead to a positive tuberculin skin test EXCEPT:

A

being near someone with tuberculosis

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25
Q

Which one of the following is NOT a typical symptom of influenza?

A

diarrhea

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26
Q

The most effective means of preventing influenza is:

A

annual vaccination

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27
Q

The patient is suffocating because of the accumulation of dead tissue and fibrin in her throat. What is the etiology of the symptoms?

A

Corynebacterium

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28
Q

A patient has a severe cough due to mucus accumulation and is suspected to have pertussis. What is the etiology of the symptoms?

A

Bordetella

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29
Q

Which one of the following is NOT an intracellular parasite?

A

Neisseria

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30
Q

Mycoplasma infection causes:

A

Walking pneumonia

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31
Q

T/F A positive tuberculosis skin test indicates that the patient has active tuberculosis.

A

False

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32
Q

All of the following are true of the common cold EXCEPT:

A

early treatment will drastically reduce the disease symptoms

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33
Q

T/F Treponema pallidum is a causative agent of Syphilis.

A

True

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34
Q

Which of the following pairs is NOT correctly matched for Gram reaction?

A

Neisseria gonorrhoeae – Gram-positive

35
Q

Which one of the following is NOT a sexually transmitted pathogen?

A

Varicella-Zoster

36
Q

T/F Bacteria are generally 1-2 micrometer in size.

A

True

37
Q

Which one of the following is incorrect about viruses?

A

are usually visible under a standard light microscope

38
Q

Which of the following have a membrane enclosed nucleus?

A

yeast cell

39
Q

T/F Peptidoglycan is part of the cell wall of all living cells.

A

False

40
Q

Which one of the following is incorrect about bacteria?

A

contain mitochondria

41
Q

Cell wall of a Gram-negative bacterial cell consists of:

A

thin layer of peptidoglycan between cytoplasmic and outer membranes

42
Q

Which of the statements regarding enzymes is false?

A

Enzymes increase an activation energy of reactions

43
Q

T/F During the aerobic metabolism of glucose to CO2, the process that produces the most ATP for the cell is oxidative phosphorylation.

A

True

44
Q

T/F During aerobic respiration of glucose, the terminal electron acceptor is oxygen.

A

True

45
Q

T/F In the molecule ATP, useful energy for the cell is stored in carbon-carbon bonds.

A

False

46
Q

T/F Most bacteria reproduce by binary fission.

A

True

47
Q

RNA is made of:

A

ribonucleotides

48
Q

Which molecules are composed of a chain of amino acids?

A

proteins

49
Q

Transcription followed by translation are the steps of:

A

gene expression

50
Q

Ribosomes are made of:

A

RNA and proteins

51
Q

Which of the following statements about viruses is FALSE?

A

Viruses use their own catabolic enzymes

52
Q

Phagocytic cells of the immune system are:

A

neutrophils, macrophages, dendritic cells

53
Q

Which of the following makes IgG antibodies?

A

plasma B cell

54
Q

IgG antibodies:

A

most abundant in blood

55
Q

Lymphocytes involved in “cell-mediated” adaptive response are:

A

T Cells

56
Q

Which one of the following statements about genital warts is FALSE?

A

lesions are always precancerous

57
Q

An example of a latent viral infection is:

A

genital herpes

58
Q

Most of the normal microbiota of the digestive system are found in the:

A

small intestine and large intestine

59
Q

Which of the following is directly involved in the initiation of dental caries?

A

lactic acid

60
Q

Streptococcus mutants that cause dental caries are:

A

gram positive

61
Q

Periodontitis (and possible Alzheimer’s) is caused by:

A

Porphyromonas gingivalis

62
Q

Shigella species are a common cause of gastrointestinal ________.

A

infections

63
Q

Staphylococcus aureus is a common cause of gastrointestinal _________.

A

intoxications

64
Q

The most common cause of traveler’s diarrhea is:

A

E. Coli

65
Q

Salmonella typhi is a causative agent of:

A

typhoid fever

66
Q

How Dysentery is different from Diarrhea?

A

usually due to infection of the large intestine, mucus and blood can be present in the stools, and it is a severe diarrhea

67
Q

“Rice water” stools and dehydration are characteristic of:

A

cholera

68
Q

Many bacterial infections of the lower digestive tract are treated with:

A

water and electrolytes

69
Q

intestinal flu is caused by

A

rotavirus

70
Q

Helicobacter pylori is responsible for:

A

peptic ulcer disease

71
Q

Disease caused by fecal-oral transmission are:

A

Cholera, Hepatitis A, Shigellosis, andTyphoid fever

72
Q

Epidemics related to bacterial infection of the digestive system are typically caused by:

A

contaminated food and water

73
Q

Which of the following causes inflammation of the liver?

A

hepatitis A virus

74
Q

infection of the brain is also called

A

encephalitis

75
Q

Bacterial encephalitis difficult to treat because:

A

many antibiotics cannot penetrate the blood-brain barrier

76
Q

All of the following can directly cause meningitis EXCEPT:

A

Mycobacterium leprae

77
Q

Arboviruses cause ________ and are transmitted by ________.

A

encephalitis; mosquitoes

78
Q

Which of the following statements about rabies is FALSE?

A

most infections in the U.S. are the result of bites from infected dogs

79
Q

Botulism and Tetanus is caused by a member of which genus?

A

clostridium

80
Q

Tetanus and Botulism toxins are “AB toxins”. Which of the following describes the enzymatic activity of tetanus toxin and of botulism toxin?

A

protease

81
Q

Which of the following pairs is mismatched?

A

botulism – stimulates transmission of nerve impulse

82
Q

A pathologist detects Negri bodies while examining a brain section taken at autopsy. What was the cause of death?

A

rabies

83
Q

Exfoliative toxin secreted by Staphylococcus aureus is responsible for:

A

scalded skin syndrome

84
Q

Tinea pedis infection results in:

A

ringworm disease

BIO SCI 101 (3 decks)

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