Bacteria that live in harmony with other organisms without causing harm or benefit

Bacteria that cause harm to other organisms

Bacteria that benefit other organisms

Bacteria that are always pathogenic

Which of the following is an example of commensals?

Bacteria on the skin or in the mouth

Bacteria in the bloodstream causing infection

Parasites in the digestive tract

Which of the following is a situation where commensal bacteria might become opportunistic pathogens?

When they are in a stable ecosystem

When they are utilized in fermentation processes

When they are in a competitive environment with other bacteria

What is the role of mutualistic bacteria in ruminants?

They break down cellulose for digestion.

They cause diseases in the gut.

They compete with the host for nutrients.

Is moisture considered necessary for bacterial growth?

No, bacteria prefer dry conditions.

Moisture has no effect on bacterial growth.

Only certain types of bacteria prefer moisture.

What is pathogenicity?

The ability of an organism to enter the body, set up disease, and cause symptoms

The ability of an organism to be affected by a disease

The study of pathogens and their effects on the body

The process by which a disease spreads from one organism to another

What is a virulent pathogen?

A pathogen that readily sets up infection and produces severe symptoms

A pathogen that cannot cause disease

A pathogen that causes mild symptoms

A beneficial organism that helps in disease prevention

What is disease generally a result of?

The virulence of the pathogen and the resistance of the host

The geographic location of the host

What can lead to symptoms in some diseases?

An overreaction of the host's defense mechanism

A genetic predisposition in the host

A mild reaction of the host's defense mechanism

Why might it be necessary to cultivate bacteria from a sample collected from an infected patient?

To determine the cause of the infection and perform an antibiotic sensitivity test

To identify the patient's genetic makeup

To observe the bacteria's ability to cause disease in a host

To test the effectiveness of antiviral medications

What is a key difference between bacteria and viruses in terms of cultivation?

Bacteria can be cultured using artificial media, while viruses require a host

Bacteria can only be cultured inside a living host, while viruses can be cultured using artificial media

Both bacteria and viruses can be cultured using artificial media without a host

Both bacteria and viruses require a living host to be cultured

Antibiotic discs are added to petri dishes impregnated with the colony and incubated. What are the labels indicating on the petri dish regarding antibiotic sensitivity and bacterial growth

Strongly Inhibits growth - sensitive

Mildly inhibits growth - sensitive

Culture medias consist of liquid broths or solid/jelly like nutrient solution based on agar. Categorise the culture medias:

provides basic nutrients for undemanding bacteria

Blood agar - contains 5-10% blood - supports growth of most mammalian pathogens

Chocolate agar - blood agar heated to 80*C releasing Hb for bacteria nutrition

Inhibits growth of some bacteria

MacConkeys agar - gram negative bacteria

Deoxylate-citrate agar - salmonella

Sabourauds agar - high glucose - dermatophytes

Bacterial Shapes Quiz

Authored by Abigail Pamment

Biology

University

NGSS covered

Used 8+ times

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36 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What term is used to refer to bacteria that are cylindrical or rod-shaped?

Vibrios

Spirilla

Bacilli

Spirochetes

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are spiral or helical bacterial cells called if they have a rigid cell wall?

Bacillus

Vibrios

Spirillum

Spirochetes

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What name is given to curved bacteria?

Bacilli

Spirilla

Spirochetes

Vibrios

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are spiral or helical bacterial cells called if the cell wall is flexible?

Bacillus

Spirillum

Vibrios

Spirochetes

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What term is used to describe spherical cells?

Bacilli

Cocci

Spirilla

Vibrios

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are cells called that remain attached in pairs after division?

Streptococci

Staphylococci

Diplococci

Monococci

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cells that remain attached forming chains after division are known as what?

Diplococci

Bacilli

Streptococci

Staphylococci

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Bacterial Shapes Quiz

What term is used to refer to bacteria that are cylindrical or rod-shaped?

What are spiral or helical bacterial cells called if they have a rigid cell wall?

What name is given to curved bacteria?

What are spiral or helical bacterial cells called if the cell wall is flexible?

What term is used to describe spherical cells?

What are cells called that remain attached in pairs after division?

Cells that remain attached forming chains after division are known as what?

What name is given to the irregular grape-like clusters formed when cells divide randomly?

What term is used to describe cocci bacteria that are found in pairs?

What arrangement of cells is characteristic of Streptococci?

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