WorksheetsMicroorganisms Review
Total questions: 20
Worksheet time: 24mins
Lactobacillus is a microorganism better known as Probiotics. Probiotics are a living bacterium that can help the body absorb nutrients and keep a healthy balance of beneficial bacteria. Conditions like lactose intolerance, eczema, asthma, and irritable bowel syndrome can be treated using probiotics. You can find lactobacillus in Greek yogurt, and it can be taken in tablet form. Lactobacillus may also cause arthritis, bloating, blockage of a lung artery, diseases of the esophagus, heart inflammation, liver infection, skin reactions, stomach cramping, stomach lining inflammation, and stomach rumbling.
(a)
Harmful microorganisms found in food can cause illnesses such as food poisoning.
True
False
Harmful microorganisms ...
Is used to make cheese and yogurt
causes diseases
fights off diseases
breaks down food in your digestive system
Which Best supports why microorganisms are beneficial to people?
Many of them can survive extremely harsh conditions.
Many microorganisms are bacteria and viruses that can be used to treat diseases.
They are decomposers that help break down waste
Some microorganisms aide in food growth, production, and digestion.
Which statement below is true about washing your hands frequently?
Washing your hands frequently prevents spreading harmful microorganisms from one person to another.
Washing your hands frequently keeps your hands smelling fresh and clean.
Washing your hands frequently makes your hands soft incase you need to shake hands with someone.
Washing your hands frequently produces germs that can be passed to others.
Bacteria can be both beneficial and harmful. Which statement below is true about bacteria as a beneficial microorganism? (Select All that Apply)
It causes diseases
It helps our digestive system break down food
It helps the plants absorb nitrogen through its roots
It helps turn milk into yogurt
It is not a good idea to drink water from the faucet when visiting other cities and countries outside of where you live. Drinking the water from a faucet that you don’t usually drink from can make you ill, because microorganisms in your body are not used to are in the water.
True
False
When harmful microorganisms discolors seawater it...
raises the level of oxygen in the water
lowers the levels of oxygen in the air
lowers the level of oxygen in the water
raises the levels of oxygen in the air
Antibiotics are made to fight against what type of infectious microorganisms?
carcinogenic
viral
bacterial
pathogenic
Which is true about bacteria as it relates to trees?
Bacteria breaks down the leaves that fall to release nutrients
Bacteria develops into new leaves for the trees
Bacteria provides food for the leaves on the ground
Bacteria prevents trees from losing leaves
Our bodies are filled with many kinds of good bacteria. However, when a person gets sick because bad bacteria has entered their body, they take antibiotics to kill the harmful bacteria. Antibiotics can….
only kill the bad bacteria and makes you feel better
will kill both the good and bad bacteria and may cause a stomach ache
only kill the good bacteria and make you feel worse
kill both the good and bad bacteria, but it will not affect you
When toxic cyanobacteria takes over an aquatic ecosystem, it collects and forms a thick carpet near the surface. This is called an algal bloom. The microorganisms in an algal bloom block the light from the Sun but still absorb its heat. Which argument MOST LIKELY describes the effect of an algal bloom on an ecosystem?
Plants in the water will not receive enough sunlight and their populations will decrease.
The temperature of the water will become too cold for marine life to be able to survive.
Plants in the water will receive extra nutrients from sunlight and their population will increase.
The temperature of the water will increase the number of food sources for marine life.
Yeast is a single-celled fungus that can survive in the absence of oxygen by producing alcohol and CO2 as waste material. Which statement BEST explains the role of yeast in the food industry?
It helps in the packaging of canned fruit because it keeps it fresh.
It helps in the rising of dough by producing CO2 that gets trapped in the dough
It helps add flavor to pickled foods by producing alcohol.
It helps add color to processed food items by producing cellular waste.
Which of these is NOT a kind of bacteria that can cause food poisoning?
Salmonella
Variola
E. coli
Listeria
Cooking food to the recommended temperature kills helpful microorganisms.
True
False
Which of the following are places that microorganisms can be found?
air, water, humans, and soil
air and water only
air, water, and soil
air only
Biologists working in dry, bare Arizona deserts have found life just below the surface. In many areas, small clumps of sand are held together by strands of tiny bacteria. After heavy rains, the bacteria germinate and grow. They form mats that trap sand during the wind and rain of the storm season. The biologists claim that the bacteria are beneficial to the ecosystem. Which argument BEST supports their claim?
The bacteria add vital nutrients to the soil.
The bacteria weather large rocks into soil.
The bacteria store water for the dry season.
The bacteria slow the rate of soil erosion.
Which of these is NOT caused by a microorganism?
Tooth Decay
A bone fracture
A cold
Flu
Which of these is NOT an example of a beneficial microorganism?
Bacteria used to make yogurt
Mold that grows on bread
Microorganisms causing leaves to compost
Bacteria used to make cheese
Which of the following are true about microorganisms? Select all that apply.
They feed and grow
They reproduce
They are all harmful
They grow and reproduce best in warm moist environments
They are both beneficial/helpful and harmful ones on the inside of us
