Microbiology Final (Samford-Keller) Questions and
Answers
1. A zoonosis is a disease: spread from animals to humans
2. When an organism is within a host but cannot be detected by culture, we call it : a latent
state
3. What is true about the LD50 and ID50?: The ID50 is always lower than the LD50
4. A positive antibody test for HIV would be a of infection: sign
5. What is a host factor in disease?: age over 60
6. The best descriptive term for the normal vitamin K producing microbiota is: mutualitst
7. Which portal of entry is employed by organims that are transmitted by flea or tick bites?:
parenteral
8. A portal exit would be: Feces, insect bite, blood removal
9. If a person has recovered from a disease but continues to shed disease agents, that person is
a: carrier
10.The number of deaths associated with an infection is called: mortality
11.What is an example of an indirect method of disease transmission?: mos- quito bite
12.How do scientists describe a disease that is always present in a commu- nity?: endemic
13.The phrase is the time that lapses between encounter with a pathogen and the first
symptoms: incubation
14.A subclinical infection is one that is acquired in a hospital or medical facility: FALSE
15.The presence of a few bacteria in the blood is called bacterimia: TRUE
16.atoms of the same element that have different numbers of neutrons: iso- topes
17.The structure of a protein is the sequence of amino acids: primary
18.What does not have either chains or rings of carbon: nucleic acids, proteins, lipids, and
carbohydrates
19.DNA is a hereditary molecule that is composed of: deoxyribose, phosphate, and nitrogen
bases
, Microbiology Final (Samford-Keller) Questions and
Answers
20.Membranes are mainly composed of macromolecules called: phospholipids
21.A functional group designated -COOH is known as a: carboxyl
22.The ends of a chain of are designated 5' and 3' (5-prime and 3 prime).:
DNA and RNA
23.A cell is considered when compared to pure water: hypertonic
24.Hydrogen bonds can form between adjacent to each other: a hydrogen atom
and an oxygen atom
25.A solution with a pH of 2 than a solution with a pH of 8: has more H+
26.What best describes a lysosome?: sac of degradative enzymes
, Microbiology Final (Samford-Keller) Questions and
Answers
27.What effect does increasing the temperature have on an enzyme?: increas- es the enzyme's
rate to an optimum, the decreases the rate
28.Both DNA and RNA are composed of: polynucleotides
29.What best describes what an enzyme does?: decreases the activation energy
30.Fatty acids that have double bond are called and the fluidity of the
membrane: Unsaturated, increase
31.The molecule glycerol has carbons that can bind fatty acids: 3
32.RNA plays an important role in what biological process?: protein synthesis
33.An atom that can donate electrons during a reaction is called: an oxidizing agent
34.The S in the CHNOPS element is sodium: FALSE
35.A nonpolar covalent bond can be made between two oxygen atoms: TRUE
36.What is true about pili?: Pili facilitate nutrient transport
37.You observe rod-shaped, pink cells on a slide that had just been Gram stained. You can
assume that their cell envelope contains: teichoic acid
38.What is not a part of the interior cytoskeleton of eukaryotic cells?: cilia
39.Penicillin works by inhibiting cross bridge formation. Penicillin thus works on the: cell wall
40.Staphylococci are classified as being found in clusters. This is due to
in several planes.: septation
41.A bacterial arrangement of spheres in pairs is described as: biplococci
42.Which of the following is present in both gram-positive and gram-negative cell walls?:
peptidoglycan
43.Upon viewing a specimen through microscopic techniques, you realize the cells all contain
ribosomes. Based upon this information, you eliminate which of the following from your list of
potential microorganisms: (bacterium, archaea, eukaryote): None can be eliminated based on this
observation alone
44.In bacteria, the presence of B-lactamase would specifically result in for
Answers
1. A zoonosis is a disease: spread from animals to humans
2. When an organism is within a host but cannot be detected by culture, we call it : a latent
state
3. What is true about the LD50 and ID50?: The ID50 is always lower than the LD50
4. A positive antibody test for HIV would be a of infection: sign
5. What is a host factor in disease?: age over 60
6. The best descriptive term for the normal vitamin K producing microbiota is: mutualitst
7. Which portal of entry is employed by organims that are transmitted by flea or tick bites?:
parenteral
8. A portal exit would be: Feces, insect bite, blood removal
9. If a person has recovered from a disease but continues to shed disease agents, that person is
a: carrier
10.The number of deaths associated with an infection is called: mortality
11.What is an example of an indirect method of disease transmission?: mos- quito bite
12.How do scientists describe a disease that is always present in a commu- nity?: endemic
13.The phrase is the time that lapses between encounter with a pathogen and the first
symptoms: incubation
14.A subclinical infection is one that is acquired in a hospital or medical facility: FALSE
15.The presence of a few bacteria in the blood is called bacterimia: TRUE
16.atoms of the same element that have different numbers of neutrons: iso- topes
17.The structure of a protein is the sequence of amino acids: primary
18.What does not have either chains or rings of carbon: nucleic acids, proteins, lipids, and
carbohydrates
19.DNA is a hereditary molecule that is composed of: deoxyribose, phosphate, and nitrogen
bases
, Microbiology Final (Samford-Keller) Questions and
Answers
20.Membranes are mainly composed of macromolecules called: phospholipids
21.A functional group designated -COOH is known as a: carboxyl
22.The ends of a chain of are designated 5' and 3' (5-prime and 3 prime).:
DNA and RNA
23.A cell is considered when compared to pure water: hypertonic
24.Hydrogen bonds can form between adjacent to each other: a hydrogen atom
and an oxygen atom
25.A solution with a pH of 2 than a solution with a pH of 8: has more H+
26.What best describes a lysosome?: sac of degradative enzymes
, Microbiology Final (Samford-Keller) Questions and
Answers
27.What effect does increasing the temperature have on an enzyme?: increas- es the enzyme's
rate to an optimum, the decreases the rate
28.Both DNA and RNA are composed of: polynucleotides
29.What best describes what an enzyme does?: decreases the activation energy
30.Fatty acids that have double bond are called and the fluidity of the
membrane: Unsaturated, increase
31.The molecule glycerol has carbons that can bind fatty acids: 3
32.RNA plays an important role in what biological process?: protein synthesis
33.An atom that can donate electrons during a reaction is called: an oxidizing agent
34.The S in the CHNOPS element is sodium: FALSE
35.A nonpolar covalent bond can be made between two oxygen atoms: TRUE
36.What is true about pili?: Pili facilitate nutrient transport
37.You observe rod-shaped, pink cells on a slide that had just been Gram stained. You can
assume that their cell envelope contains: teichoic acid
38.What is not a part of the interior cytoskeleton of eukaryotic cells?: cilia
39.Penicillin works by inhibiting cross bridge formation. Penicillin thus works on the: cell wall
40.Staphylococci are classified as being found in clusters. This is due to
in several planes.: septation
41.A bacterial arrangement of spheres in pairs is described as: biplococci
42.Which of the following is present in both gram-positive and gram-negative cell walls?:
peptidoglycan
43.Upon viewing a specimen through microscopic techniques, you realize the cells all contain
ribosomes. Based upon this information, you eliminate which of the following from your list of
potential microorganisms: (bacterium, archaea, eukaryote): None can be eliminated based on this
observation alone
44.In bacteria, the presence of B-lactamase would specifically result in for
