Lab Module 7

Question 1

What organisms is being stained here?

A) Staphylococcus
B) Stergenous
C) None of these
D) Sinous

Answer 1

Correct Answer:
A) Staphylococcus

Question 2

What direction is this slide placed when moved in the direction of the arrow?

A) None of these
B) Upside-down
C) Right-side up
D) Sideways

Answer 2

Correct Answer:
B) Upside-down

Question 3

What is being placed on the slide?

A) Saline solution
B) Bacteria
C) DI water
D) Chemical mixture

Answer 3

Correct Answer:
C) DI water

Question 4

What is this tool called?

A) Subcutaneous fascia
B) Inoculation loop
C) Bunsen burner
D) Heat tool

Answer 4

Correct Answer:
B) Inoculation loop

Question 5

What is occurring at this step?

A) Transfer of agar
B) Transfer of bacteria
C) Transfer of DI water
D) None of these

Answer 5

Correct Answer:
B) Transfer of bacteria

Question 6

It is important to completely fill the circle here with the mixture of water and bacteria.

A) Yes
B) None of these
C) Only sometimes
D) No

Answer 6

Correct Answer:
A) Yes

Question 7

What is occurring during this step?

A) Air drying at lowered temperatures
B) None of these
C) Air drying at room temperature
D) Air drying at elevated temperatures

Answer 7

Correct Answer:
C) Air drying at room temperature

Question 8

How many times does this slide pass over the heat?

A) 3
B) 2
C) 1
D) 4

Answer 8

Correct Answer:
A) 3

Question 9

Safranine will stain bacterial cells what color?

A) Purple
B) Red
C) Blue
D) Green

Answer 9

Correct Answer:
B) Red

Question 10

What objective power do you begin with when looking at a slide?

A) Lowest
B) Zero
C) Highest
D) Medium

Answer 10

Correct Answer:
A) Lowest

Question 11

Cell membranes protect:

A) Organelles
B) All of these
C) Molecules it needs to survive
D) Nucleus

Answer 11

Correct Answer:
B) All of these

Question 12

According to the video, what is the name of this structure as shown by the arrow?

A) Hydrophilic head
B) Sugar side chain
C) Hydrophobic fatty acid tail
D) Cholesterol

Answer 12

Correct Answer:
C) Hydrophobic fatty acid tail

Question 13

What is the name of this structure?

A) Hydrophobic fatty acid tail
B) Sugar side chain
C) Hydrophilic head
D) Cholesterol

Answer 13

Correct Answer:
B) Sugar side chain

Question 14

What is the name of this structure?

A) Hydrophobic fatty acid tail
B) Sugar side chain
C) Cholesterol
D) Secondary protein

Answer 14

Correct Answer:
C) Cholesterol

Question 15

The phospholipid head repels water.

A) Can both repel and attract water depending on its electrical current
B) False
C) True
D) None of these

Answer 15

Correct Answer:
B) False

Question 16

The phospholipid bilayer contains:

A) Carbohydrates
B) Proteins
C) Cholesterol
D) All of these

Answer 16

Correct Answer:
D) All of these

Question 17

This process, engulfing of substances via the membrane, is known as:

A) Myocytosis
B) Exocytosis
C) Econcytosis
D) Endocytosis

Answer 17

Correct Answer:
D) Endocytosis

Question 18

Which molecules are non-polar?

A) Vitamins
B) All of these
C) Carbon dioxide
D) Oxygen

Answer 18

Correct Answer:
B) All of these

Question 19

What is this model called?

A) Fluid monarchy
B) Static mosaic
C) Rough mosaic
D) Fluid mosaic

Answer 19

Correct Answer:
D) Fluid mosaic

Question 20

Pathogens often exploit characteristics of the cell membrane to gain entry. Which structural feature of the membrane is most directly involved in this process?

A) Integral membrane proteins that act as receptors for pathogen attachment
B) Cholesterol molecules that rigidify the membrane and block all invaders
C) The hydrophobic core that prevents all molecular movement
D) Peripheral proteins that detach during infection and create membrane pores

Answer 20

Correct Answer:
A) Integral membrane proteins that act as receptors for pathogen attachment