Midterm

Question 1

Using the coarse focusing knob, which way must it be turned for the stage to move away from the objective?

Answer 1

Clockwise

Question 2

When you place the “roe” slide on the microscope, what happens when you look through the lenses?

Answer 2

It flips upside down and horizontally

Question 3

What happens to the magnified image when you move the slide to the left or right?

Answer 3

It moves the opposite way

Question 4

As magnification increases, does field of view increase or decrease?

Answer 4

Decrease

Question 5

On the crossed fibers slide, what thread was on top?

Answer 5

Blue

Question 6

Microbiology is the study of…

Answer 6

Microbes

Question 7

The “medium” is

Answer 7

the nutrient rich material in which you culture the microorganisms

Question 8

In the bacterial growth and inhibition lab, what was the medium?

Answer 8

Agar

Question 9

What is inoculation?

Answer 9

Adding microbes to the medium in which they will grow

Question 10

What is the aseptic technique?

Answer 10

avoiding contaminating your culture, yourself, and your surroundings

Question 11

What were the steps in the bacterial inhibition lab?

Answer 11

1) divide petri dish
2) use a swab to obtain a sample from a surface and swab onto one half of petri dish
3) wipe down surface with alcohol
4) swab surface again and rub on other half of petri dish

Question 12

Hypothesis of Bacterial Growth experiment

Answer 12

If we swab the same area with alcohol, there will be significantly less bacteria growth

Question 13

4 variables that could affect the outcome of the bacterial growth experiment

Answer 13

Human error
Strength of the alcohol
if someone swabbed before us
amount of alcohol used to clean

Question 14

What does a control plate control for?

Answer 14

To show what the sample would look like without contamination

Question 15

How many colonies were on the petri dish after incubation? (on each side) What kind of colonies were they?

Answer 15

28; none; bacterial

Question 16

How many bacteria does it take to form one colony?

Answer 16

one

Question 17

Which of the antibiotics were most effective in treating E. coli?

Answer 17

Ampicillin

Question 18

What is the digestive space of a planarian called?

Answer 18

gastrovascular cavity

Question 19

_____ are stimulated by light and ______ respond to chemicals

Answer 19

Photoreceptors, chemoreceptors

Question 20

Kinesis ______ movement and taxis is _____ movement

Answer 20

non-directed, directed

Question 21

Positive taxis means what? Negative taxis?

Answer 21

Toward a stimulus, away from a stimulus

Question 22

1) response to gravity
2) response to light
3) response to chemicals

Answer 22

1) geotaxis
2) phototaxis
3) chemotaxis

Question 23

How did the planarian respond to light?

Answer 23

He swam underneath the foil to get away from the light

Question 24

How did the planarian respond to gravity?

Answer 24

When the tube was inverted, he kind of moved with the water but also clung to the sides of the tube

Question 25

How did the planarian respond to salt? Alcohol?

Answer 25

The majority of the time, the planarian would swim toward the chemicals like he wanted to see what it was but then he would swim away. He did stay close when there were 4 strips of alcohol though

Question 26

How many people were infected in the first round of disease transmission?

Answer 26

3

Question 27

After the round of transmission with the behavior cards, how many were infected? is this normal?

Answer 27

only 2 and no this is not normal. Usually the entire class becomes infected after this round.