Test One Answers

Question 1

Amino Acids have nitrogen in them

Answer 1

TRUE

Question 2

Xylitol is a sugar alcohol that can prevent tooth decay and ear infections

Answer 2

TRUE

Question 3

Viruses are very small parasitic eukaryotes

Answer 3

FALSE

Question 4

A bio-film is a community of microbes that is attached to a surface

Answer 4

TRUE

Question 5

Enzymes can be denatured by a large change in PH

Answer 5

TRUE

Question 6

The three domains of cellular life are bacteria, archaea, and eukaryotes

Answer 6

TRUE

Question 7

Spherical bacterial cells are called cocci

Answer 7

TRUE

Question 8

Some microbes, including certain viruses, can survive extremely dry conditions

Answer 8

TRUE

Question 9

Viruses use host cell ribosomes to synthesize viral problems

Answer 9

TRUE

Question 10

all prokaryotes have a wall that contains peptidoglycan

Answer 10

FALSE

Question 11

hydrolysis is when monomers are joined together to make a polymer

Answer 11

FALSE

Question 12

Some, but not all, carbohydrates are sugars

Answer 12

FALSE

Question 13

gram negative bacteria have an outer membrane that contains endotoxin

Answer 13

TRUE

Question 14

the monomers in an enzyme are amino acids

Answer 14

TRUE

Question 15

Viral surface proteins allow a virus to attach to its hosts cell

Answer 15

TRUE

Question 16

Echerichia blattae is in the same genus as

Answer 16

escherichia albertii

Question 17

the gram-positive coccus staphylococcus aureus is very good at avoiding phagocytes. which of the following a feature of S. aureus that accounts for its resistance to phagocytosis

Answer 17

CAPSULE

Question 18

Virulence factors are the characteristic of a ________ that allow it to cause disease

Answer 18

PATHOGEN

Question 19

a virus the can infect all cells

Answer 19

has all possible receptors on its surface

Question 20

these cells do NOT have peptidoglycan in their cell walls:

a. gram positive bacteria
b. gram negative bacteria
c. phagocytes
d. members of the genus mycobacterium

Answer 20

c. phagocytes

Question 21

an unknown molecule is analyzed and found to contain lipids and sugars. this unknown molecule is called:

a. phospholipid
b. glycolipid
c. glycoprotein
d. polysaccharide

Answer 21

b glycolipid

Question 22

we know that shape determines the function of a protein. two of the following illustrate this idea. which one does NOT?

a. binding of substrate to active site of enzyme
b. how a glycocalyx is used to form a bio-film
c. how viruses attach themselves to their specific host cell

Answer 22

b. how a glycocalyx is used to form a bio-film

Question 23

which is the enzyme

a. trehalose
b. trehalase
c. glucose

Answer 23

b. trehalase

Question 24

all bacteria are

a. gram-positive
b. gram-negative
c. archaea
d. prokaryotic

Answer 24

d. prokaryotic

Question 25

gram positive bacteria have ____ layer of peptidoglycan than gram-negative bacteria a. thinner b. thicker c. more fluid d. less fluid

Answer 25

b. thicker

Question 26

when viral genes are expressed in a host cell... a. host cell amino acids are used to make a protein b. viral amino acids are used to make a protein c. the virus attaches to the host cell d. the virus expands its host range

Answer 26

a. host cell amino acids are used to make a protein

Question 27

Micrococcus luteus and micrococcus roseus are two __ in the same _____ a. viruses, domain b. organisms, species c. proteins, cell d. species, genus

Answer 27

d. species, genus

Question 28

``` GLUCAGON IS A POLYPEPTIDE what is glucagon? a. toxin b. cell wall component c. polymer d. building bloc kfor a large molecule ```

Answer 28

c. polymer

Question 29

what is the function of viral surface proteins? a. to damage host cells b. they are a type of endotoxin c. to attach to host cells d. they are used in gram stains

Answer 29

c. to attach to host cells

Question 30

what part of the E. coli cell causes this patient's symptoms a. a component of the cell wall b. the plasma membrane c. the ribosomes d. the cell's enzymes

Answer 30

a component of the cell wall