Module 1 Quiz

Question 1

The gram stain is useful for what?

Answer 1

1. Identification of bacteria
2. Selection of antibiotics
3. Selection of disinfectants

Question 2

Staphylococci are average sized bacteria that measure one micrometer in diameter. How many of these bacteria could be lined up side by side along a straight line measure one millimeter?

Answer 2

1000

Question 3

Bacteria that are described as grams positive are what?

Answer 3

Appear bluish black after being stained with the gram stain

Question 4

What following agent may inhibit viral replication?

Answer 4

Acyclovir

Question 5

Formation of bacterial endoscopes occur when what?

Answer 5

Growth conditions are adverse: to cold, too hot, too dry

Question 6

What is the order of sizing from smallest to largest for microorganisms?

Answer 6

1. Viruses
2. Bacteria
3. Fungi
4. Protozoa

Question 7

The three shapes of bacteria are what?

Answer 7

1. Cocci
2. Bacilli (Rods)
3. Spirals

Question 8

People suffering from common colds should do what?

Answer 8

Not take antibiotics

Question 9

The process by which bacteria reproduce is what?

Answer 9

Binary fission

Question 10

The growth phase in which the number of new cells equals the number of dying cells is what?

Answer 10

Stationary phase

Question 11

During the stage of an infection between contact and appearance of symptoms (incubation), microbes are in the following phase?

Answer 11

lag

Question 12

All viruses replicate how?

Answer 12

Inside living host cells

Question 13

The growth phase where all bacteria are multiplying at maximum rate is what?

Answer 13

Log

Question 14

Which of the following objects would be considered microscopic

Answer 14

1 micrometer

Question 15

The unit used to measure the size of microoganisms is what?

Answer 15

Micrometers

Question 16

Destruction of bacterial endoscopes are what?

Answer 16

1. Difficult
2. Requires high temperatures (121 degrees C) for destruction
3. Requires the use of high level disinfectant

Question 17

If a patient had gram negative bacilli in their CSF, it would mean that they had to possible infection with what?

Answer 17

Bacteria

Question 18

An enveloped virus has what?

Answer 18

An outer lipid coat

Question 19

Viral replication requires what?

Answer 19

Initial attachment to complementary sites on a host cell

Question 20

A colony of bacteria results in what?

Answer 20

The multiplication of one bacterium

Question 21

Which of the following belongs to the group Protozoa?

1. Candida
2. Streptococcus
3. Adenovirus
4. Giardia

Answer 21

Giardia

Question 22

The phases of the growth curve listed in order are what?

Answer 22

Lag, log, stationary, death(decline)

Question 23

Infections caused by staphylococcus tend to develop quickly whereas tuberculosis is slowly developing disease that may take weeks to produce disease symptoms. What would this tell us about the generation times of these two bacteria? Which bacteria would form colonies the fastest on culture media?

Answer 23

Staphylococcus has a short generation time and would grow overnight on culture media

Question 24

Rapidly growing bacteria have a generation time of approximately what?

Answer 24

15- 30 minutes

Question 25

Early microbiologist attempted to disprove the theory of spontaneous generation by boiling hay to kill microbes and culturing the heated infusion. Bacteria always grew from the “sterilized” infusion lending support to the concept of spontaneous generation. How could bacteria grow from this heated and cooled infusion?

Answer 25

1. Heat resistant bacterial spores are found in hay and soil. Spores could become vegetative and grow in the infusion
2. Boiling generally will not kill spores (therefore the infusion was not sterilized)

Question 26

The phase in which the patient is recovering is what?

Answer 26

Death (decline)

Question 27

Some bacteria are able to survive for long periods of time in dry conditions because they?

Answer 27

Can produce endoscopes