Quiz 2

Question 1

Imagine you are viewing bacteria with a microscope, and cells are sphere-shaped and arranged into irregular clusters. How could you describe them?

Answer 1

Straphylococci

Question 2

Peptidoglycan belongs to this category of biological molecules

Answer 2

Carbohydrates

Question 3

Which of the following is NEVER found in gram negative bacteria

A. peptidoglycan
B. Teichonic acids
C. Plasma membrane
D. Lipopolysaccharide
E. Glycocalyx

Answer 3

Teichonic Acid

Question 4

Which of the following is NEVER found in gram positive bacteria?

A. Peptidoglycan
B. Techonic acids
C. Plasma membrane
D. Lipopolysacchraide
E. Glycocalyx

Answer 4

Lipopolysaccharide

Question 5

A gram stain is considered a ________ staining process.

Answer 5

Differential

Question 6

In a gram stained bacterium that is Gram negative, where would the crystal violet-iodine complex be located?

Answer 6

None of the above

Question 7

When this molecule breaks down, one of the products is endotoxin.

Answer 7

Lipopolysaccharide

Question 8

In a gram stained bacterium that is gram negative, where would the safarnin be located?

Answer 8

Cytoplasm

Question 9

In a gram stained bacterium that is gram positive where would the crystal violet-iodine complex be located?

Answer 9

Cell wall

Question 10

In a gram stained bacterium that is gram positive where would saffrainin be located?

Answer 10

Cytoplasm

Question 11

Gram negative bacteria have a thick layer of Peptidoglycan in their cell walls

Answer 11

False

Question 12

Which of these structures is found outside the cell wall and can be broken down and used as an energy source when resources are scarce?

Answer 12

Glycocalyx

Question 13

Which of the following bacterial structures are NOT used for locomotion in bacteria?

Answer 13

Fimbraie

Question 14

Which of the following is used to transfer a plasmid from one bacterial cell to another?

Answer 14

Pili

Question 15

The phospholipids in a plasma membrane are covalently bound to each other in order to provide strength and rigidity and prevent the cell from undergoing osmotic lysis.

Answer 15

False

Question 16

Movement of a solute down it’s concentration gradient through a membrane-bound transport protein

Answer 16

Facilitated diffusion

Question 17

This process only occurs in bacteria

Answer 17

Group translocation

Question 18

Movement of a solute down its concentration gradient directly through the phospholipid bilayer

Answer 18

Simple diffusion

Question 19

Consumes ATP to move a solute against its concentration gradient through a specific membrane- bound transport protein

Answer 19

Active transport

Question 20

Water moving across a selectively permeable membrane down its concentration gradient

Answer 20

Osmosis

Question 21

Supposes a bacterium that has lost its cell wall is placed in pure distilled water. What effect will this have on the cell?

Answer 21

There will be a net movement of water into the cell.
The cell will undergo osmotic lysis

Question 22

Suppose a typical bacterium is placed in a saturated salt solution. What effect will this have on the cell?

Answer 22

There will be a net movement of water out of the cell

Question 23

Suppose a typical bacterium is placed in a saturated salt solution. How would you describe that solution, relative to the cytoplasm of the bacterium?

Answer 23

Hypertonic