Font size
WorksheetsUnit Test - Bacteria and Food Safety
Total questions: 65
Worksheet time: 1hrs 5mins
Bacteria are...
prokaryotes.
everywhere.
decomposers.
all of these are correct.
Viruses like COVID 19 are different from bacteria because they are______________.
prokaryotic
eukaryotic
non-living
endospores
Which of the following is not caused by a virus?
Covid 19
polio
influenza
malaria
Viruses are different from bacteria because they...
use a host to reproduce.
breath oxygen.
grow.
eat food.
Which of the following is not a bacterial shape?
bacilli
spirilla
square
cocci
What is the best way to prevent the spread of all diseases?
vaccines
antibiotics
cover your mouth when coughing
wash you hands
Who is credited with creating the first antibiotic penicillin?
Jonas Salk
Robert Koch
Edward Jenner
Alexander Fleming
Tiny structures that produce proteins inside bacteria
bacteria
ribosomes
cytoplasm
endospore
A process by which bacteria reproduce asexually by dividing into two daughter cells.
binary fission
cellular respiration
pasteurization
decomposers
Organisms that break down food large, complex chemicals in dead organisms into small, simple chemicals
ribosomes
flagelllum
conjugation
decomposers
Tiny single-celled organisms that live almost everywhere
ribosomes
cytoplasm
bacteria
virus
A whip-like structure that helps a bacterial cell to move
Flagellum
Conjugation
Endospore
Pasteurization
What do viruses need to reproduce?
They need nothing.
They need a host cell
They need antibiotics.
They need vaccines.
True or False
Covid 19 is a pandemic that is caused by a virus.
true
false
Is a virus living or nonliving?
living
nonliving
Can a virus be cured with antibiotics?
yes
no
A bacteria cell is a ____________ cell.
eukaryotic
prokaryotic
plant
human
True or False: All bacteria are harmful.
false
true
A city has an outbreak of a disease that affects a large portion of its population. It is a....
pandemic
outbreak
epidemic
natural disaster
Which is most often used to destroy bacteria?
vaccine
antibiotics
vitamins
water
Diseases that can be transmitted between organisms are
infectious
inherited
environmental
Which disease can be transmitted by casual contact between two individuals?
malaria
Covid 19
lyme disease
kidney diseases
Infectious diseases can be passed from organism to organism by all of the following EXCEPT
insect bites
genetically from parents
contaminated food
pathogens in the air
How are bacteria classified?
shape
cell wall makeup
how they get energy
all of the above
What type of reproduction occurs when a bacterium transfers all or parts of its chromosomes to another cell through a bridge like structure called a pilus?
binary fission
conjugation
tertiary fission
conception
How fast can bacteria reproduce?
A single bacterium doubles with each division.
Every 20 minutes.
A single bacterial cell can turn into millions of cells in a few hours.
A single bacterial can turn into billions of cells within a day.
All of the above are correct!
What are nitrogen fixing bacteria?
These are bacteria that uses nitrogen to live or survive.
These are bacteria that can kill Covid-19.
These are bacteria that convert nitrogen gas from the air into forms of nitrogen that can be used by plants and animals.
These are bacteria that are dormant.
What do bacteria require to grow?
Time to grow and optimum temperature
Nutrients such as glucose and optimum pH
Time, temperature, nutrients, optimum pH and moisture
Time to grow and nutrients such as glucose
What are the “4 Cs of Food Safety” that are used to control bacteria?
Cover food, Chill, Clean, Combat BAC
Cook, Chill, Combat BAC, Combat cross-contamination
Cook, Chill, Clean, Combat cross-contamination
Cook, Cut, Clean, Combat cross-contamination
What effect does chilling food have on bacteria?
It kills the bacteria by breaking down their cells.
It slows the growth of the bacteria by slowing their metabolism.
It removes bacteria from hands and surfaces.
It prevents the spread of bacteria from one surface to another.
Are all bacteria harmful?
No, bacteria that have been treated with disinfectants are no longer harmful.
No, while some bacteria are pathogenic, others are necessary for our health.
Yes, given the proper environment, all bacteria can cause damage.
Yes, bacteria are pathogens and they can cause serious illnesses.
What path does food generally take along the Farm-To-Table Continuum?
Farm-Transportation-Retail-Table-Processing
Farm-Processing-Transportation-Retail-Table
Farm-Transportation-Processing-Retail-Table
Farm-Processing-Transportation-Table-Retail
A foodborne pathogen is
probiotics that are found naturally in raw foods that keep us healthy.
any microorganism found in food that can cause illness or harm to humans.
any microorganism that can cause illness in humans.
any microorganism found in food for human consumption.
What is the “Danger Zone”?
The area of the grocery store that contains high calorie foods
A downloadable app about food safety
The temperature range in which bacteria can grow
The temperature at which foods can safely be held
What is pasteurization?
A process that filters harmful bacteria from foods
A process that filters harmful bacteria from foods
The process of creating probiotics in dairy products
A heating/cooling process to destroy pathogenic microorganisms
What is the best way to ensure that hamburger patties are free of harmful bacteria?
Use a meat thermometer to ensure internal temperatures are at least 140°F.
Use a meat thermometer to ensure internal temperatures are at least 160°F.
Cook the ground beef until there is no pink visible.
Purchase ground beef from a high end market and look for the USDA symbol.
For how long should a person wash his/her hands with soap and hot water?
At least 20 seconds
It depends on how dirty his/her hands look
It depends on how busy the person is and how long it has been since the last hand washing
At least 10 seconds
Which of these “12 Most Unwanted Bacteria” is properly paired with a food with which it is most
commonly associated?
E-coli 0157-H7 – Undercooked ground beef
Campylobacter jejuni – undercooked shellfish
Vibrio-cholera – soft cheeses
Salmonella – bread past its ‘Use by’ date
Which of these is the most common source of food contamination in restaurants?
Hair not tied back properly
Food cooked to the wrong temperature
Dirty silverware or dishes
Improper hand washing practices
Which of the following 4Cs prevents bacteria from spreading from one food item to another or between foods and hands or surfaces/utensils?
Cleaning
Cooking
Chilling
Combating Cross-Contamination
What pH level do bacteria and other microorganisms can thrive?
pH 2
pH 3
pH range above 4.6
pH 4
How do scientists tell good bacteria from harmful bacteria?
DNA fingerprinting
types of reproduction
shapes of bacteria
analyzing the cell wall composition
What does DNA tell us when there is an outbreak?
Determine the source of bacteria
Classify bacteria into Gram + and Gram -
Describe the shape
tell how bacteria reproduce
Whose responsibility is to keep our food supply safe along the farm-to-table continuum?
Donald Trump
Food and Drug Administration
chefs/cooks
everyone
In the experiment "Bacteria everywhere," which of the 4 Cs applies to the data you've collected?
Chilling and Cooking
Chilling and Cleaning
Cleaning and Combating Cross contamination
Combating Cross contamination and Cooking
Which of these is an example of competitive exclusion?
Livestock that are able to survive infections of pathogenic bacteria are allowed to breed and reproduce.
Beneficial bacteria are able to colonize on young chicks, preventing pathogenic bacteria, such as
Pathogenic bacteria, such as Salmonella, are being killed with strong disinfectants that are being used on
the farms.
Over time, bacteria are evolving to become more antibiotic resistant due to overuse of the medications.
Based on the experiment "Blues the Clue" which of these statements is true about milk?
Pasteurizing milk is unhealthy, as it destroys essential amino acids.
Pasteurized milk does not contain any microorganisms.
Ultra-High-Temperature Pasteurized (UHT) milk can be stored at room temperature for up to 90 days.
All milk must be refrigerated at temperatures below 40 degrees.
What is the time/temperature relationship?
Using high heat takes more time to kill pathogenic bacteria, whereas using lower heat takes less time.
Pasteurized milk is heated for a longer time at a lower temperature, and UHT milk is heated for less time at higher temperature.
Using low heat takes less time to kill pathogenic bacteria, whereas using high heat takes more time.
There is no relationship between time and temperature.
Why is it important for public health officials like FDA - Food and Drug Administration to investigate food borne illness outbreaks?
Early detection of an outbreak helps determine the possible source of the outbreak.
Prevents additional people from getting sick or dying from consuming harmful food borne bacteria.
What public health officials learn from the outbreaks can help prevent future outbreaks.
All of these reasons are correct.
In Dr. X video -Module 4 - Retail and Home, what is one the biggest sources of food contamination in restaurants?
animals
people
rain
air pollution
What are some of the important things you learned from the four experiments on food safety? Check all correct answers.
Cooking hamburger to 160 degrees Fahrenheit is the only way to tell that the burger is safe to eat.
Temperature should be taken in the center of the hamburger.
Bacteria can grow more quickly in in regular pasteurized milk than in UHT milk because the latter uses high temperature, thus killing more bacteria.
Surfaces used to prepare raw meat must be throughly cleaned before preparing other foods on them.
Bacteria is everywhere in the school and classroom premises.
Sarah designed an experiment to find out which mouthwash was most effective against some bacteria. She cut out four different circles from a paper towel and soaked each circle in a different mouthwash. She put the circles on a nutrient agar-coated Petri dish that was covered with bacteria commonly found in the mouth. She then incubated the plate for 24 hours. The picture shows the results of this test. Which of the following should Sarah do to improve her experiment?
Use different kinds of bacteria.
Use the same type of mouthwash on each paper circle.
Use the same size paper circles for all mouthwashes.
Use a smaller petri dish.
Which of the bacterial cells shown below is a coccus?
A
B
C
none of the above
According to the figure below, the structure labeled __________ which is called a(n) __________contains peptidoglycan in bacteria but not in archaea.
A , cell wall
B, cell membrane
C, DNA
D, Flagellum
These are antimicrobial agent used to inhibit the growth of bacteria on non living things.
antiseptics
disinfectants
vaccines
antibiotics
Clear area of no growth formed around the antibiotics discs is called
________________.
zone of exhibition
zone of inoculation
zone of inhibition
zone of sterilization
He discovered the first antibiotics from penicillin mold when he noticed that this mold inhibited (stopped) the growth of Staphylococcus aureus bacteria.
Wendell Stanley
Martinus Beijerinck
Alexander Fleming
Dr. X
