Clicker Question Exam 3

28問 • 10ヶ月前

ユーザ名非公開

通報

問題一覧

E.coli generation time (doubling time) = 20 min how many generations (n) occur in 48 hrs

144

Personal care product such as Dial soap and Colgate Total toothpaste contain what antibacterial chemical

triclosan

Recently, the FDA said Dial and other “antibacterial” soaps could not be sold if they contain triclosan

lack of antibacterial research data on triclosan in soap

Thimerosol has been used to preserve what product?

certain vaccine ingredients

Thimerosol in vaccine was linked in a 1999 medical journal article with what disease in children?

autism

The author of Lancet article was Dr.Andrew Wakefield today he is

a former Dr. without a license to practice

To avoid foods that contain chemical “preservatives” you should not consume (select all that apply)

Swiss cheese , coca cola , wonder white bread , twinkies , pepperoni sausage , captain crunch cereal , Oscar Meyer baloney

How are gram-negative bacteria more resistant than gram positive?

g negative have an outer membrane

Cell numbers are measured as cfu/ml what does C F U mean?

colony forming unit

This is a single cell of e.coli. When properly plated how many colonies will this live cell form on the agar plate

1 cell will form 1 colony

Here are 5 S.aurerus cells how many colonies will this cluster on a TSA plate

1 colony

What concentration (cells/ml) of a bacteria does it take to have visible turbidity in a glass of water?

10^7 per ml

How can we tell when a cell is dead?

it won’t grow into a colony under the best condition

For wine pasterus process of pasteurization was developed to

spoilage (kill) bacteria

For dairy products pasteurization is currently used to kill

disease producing microbes spoilage bacteria

Can humans get mad cow disease from cows?

yes even if the meat it thoroughly cooked

If prions are transmitted in contaminated brain tissue, how do vegetarians cows become infected with the BSE prion?

from eating cow contaminated meat with neutral fibers

In what group would we find the most human pathogenic bacterial species

mesophiles

Where do all those electrons come from that create the toxic forms of o2

NADH and the ETS

What are the time and temp of the batch method of pateruization of dairy products

63C, 30 min

What are the time and temp of the continuous method of pasteurization

72c for 15 min

Why isn’t hexachlorophene routinely used in skin care products anymore

it can be toxic if not properly used

Which of the following best describes the pattern (progression) of the death of a microbial population

the cell in a population usually die at an constant exponential rate

Would 80 proof whiskey or vodka be effective antiseptic or disinfect?

no the alcohol content is too low

Potent antimicrobial chemicals can be used in food products to (select all that apply)

limit the growth of spoilage microbes , prevent the growth of pathogens , increase the profit of the food company and shareholders

What kinds of cells are known to serve as host to virus (select all that apply)

archea , bacteria , mold , yeast , Protozoa , insect , algae , human, plants

The famous HeLa cell line has been maintained continuously since

1951

What can trigger the latent human herpesvirus to cause cold sore (select all that apply)

getting a cold , getting a fever from another virus , a blow to the mouth , a dental procedure , getting an early spring tan (sun exposure) , being in a stressful situation

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問題一覧

E.coli generation time (doubling time) = 20 min how many generations (n) occur in 48 hrs

144

Personal care product such as Dial soap and Colgate Total toothpaste contain what antibacterial chemical

triclosan

Recently, the FDA said Dial and other “antibacterial” soaps could not be sold if they contain triclosan

lack of antibacterial research data on triclosan in soap

Thimerosol has been used to preserve what product?

certain vaccine ingredients

Thimerosol in vaccine was linked in a 1999 medical journal article with what disease in children?

autism

The author of Lancet article was Dr.Andrew Wakefield today he is

a former Dr. without a license to practice

To avoid foods that contain chemical “preservatives” you should not consume (select all that apply)

Swiss cheese , coca cola , wonder white bread , twinkies , pepperoni sausage , captain crunch cereal , Oscar Meyer baloney

How are gram-negative bacteria more resistant than gram positive?

g negative have an outer membrane

Cell numbers are measured as cfu/ml what does C F U mean?

colony forming unit

This is a single cell of e.coli. When properly plated how many colonies will this live cell form on the agar plate

1 cell will form 1 colony

Here are 5 S.aurerus cells how many colonies will this cluster on a TSA plate

1 colony

What concentration (cells/ml) of a bacteria does it take to have visible turbidity in a glass of water?

10^7 per ml

How can we tell when a cell is dead?

it won’t grow into a colony under the best condition

For wine pasterus process of pasteurization was developed to

spoilage (kill) bacteria

For dairy products pasteurization is currently used to kill

disease producing microbes spoilage bacteria

Can humans get mad cow disease from cows?

yes even if the meat it thoroughly cooked

If prions are transmitted in contaminated brain tissue, how do vegetarians cows become infected with the BSE prion?

from eating cow contaminated meat with neutral fibers

In what group would we find the most human pathogenic bacterial species

mesophiles

Where do all those electrons come from that create the toxic forms of o2

NADH and the ETS

What are the time and temp of the batch method of pateruization of dairy products

63C, 30 min

What are the time and temp of the continuous method of pasteurization

72c for 15 min

Why isn’t hexachlorophene routinely used in skin care products anymore

it can be toxic if not properly used

Which of the following best describes the pattern (progression) of the death of a microbial population

the cell in a population usually die at an constant exponential rate

Would 80 proof whiskey or vodka be effective antiseptic or disinfect?

no the alcohol content is too low

Potent antimicrobial chemicals can be used in food products to (select all that apply)

limit the growth of spoilage microbes , prevent the growth of pathogens , increase the profit of the food company and shareholders

What kinds of cells are known to serve as host to virus (select all that apply)

archea , bacteria , mold , yeast , Protozoa , insect , algae , human, plants

The famous HeLa cell line has been maintained continuously since

1951

What can trigger the latent human herpesvirus to cause cold sore (select all that apply)

getting a cold , getting a fever from another virus , a blow to the mouth , a dental procedure , getting an early spring tan (sun exposure) , being in a stressful situation