Microbiology Concepts and Prokaryotic Cells

Front

What are prokaryotic cells?

Back

Prokaryotic cells are unicellular organisms that lack a nucleus and membrane-bound organelles. They include bacteria and archaea.

Front

What are the two main types of prokaryotic cells?

Back

Bacteria and Archaea.

Front

What is a pathogen?

Back

A pathogen is a microorganism that can cause disease in a host.

Front

What are Koch's postulates?

Back

Koch's postulates are a series of criteria used to establish a causative relationship between a microbe and a disease.

Front

What is a primary pathogen?

Back

A primary pathogen is a microorganism that can cause disease in a healthy host.

Front

What is the difference between symptoms and signs of a disease?

Back

Symptoms are subjective experiences reported by the patient (e.g., pain, chills), while signs are objective evidence observed by a clinician (e.g., fever, swollen lymph nodes).

Front

What is the significance of fever in infection?

Back

Fever is a common response to infection that helps the body fight off pathogens by creating an unfavorable environment for them.

Front

What are some limitations of Koch's postulates?

Back

Some limitations include: not all pathogens can be grown in pure culture, some do not cause symptoms in all hosts, and not all pathogens have an animal host.

Front

What role do bacteria play in the ecosystem?

Back

Bacteria play essential roles in nutrient cycling, decomposition, and as part of the food web.

Front

What is the structure of a bacterial cell?

Back

A bacterial cell typically consists of a cell wall, cell membrane, cytoplasm, ribosomes, and genetic material (DNA).