General Microbiology Lecture Notes

These flashcards cover key concepts and definitions from the lecture notes on general microbiology.

What is microbiology?

Microbiology is the study of microscopic organisms, including bacteria, fungi, protists, and viruses, encompassing their behavior, evolution, ecology, beneficial roles, and pathology.

What are the two major branches of microbiology?

Pure microbiology and applied microbiology.

What does bacteriology study?

Bacteriology is the branch of microbiology concerned with the study of bacteria.

What are the fundamental characteristics of prokaryotic cells?

Prokaryotic cells lack a membrane-bound nucleus, have a simple structure, contain circular DNA, and reproduce asexually through binary fission.

What is the main difference between Gram-positive and Gram-negative bacteria?

Gram-positive bacteria have a thick peptidoglycan layer that stains purple, while Gram-negative bacteria have a thin peptidoglycan layer and an outer membrane that stains pink.

Who is considered the father of microbiology?

Antonie van Leeuwenhoek is considered the father of microbiology for being the first to observe microorganisms.

What is the germ theory of disease?

The germ theory posits that specific microorganisms cause specific diseases.

What role did Louis Pasteur play in microbiology?

Louis Pasteur challenged spontaneous generation and established the germ theory of disease, developing vaccines and the process of pasteurization.

What are endotoxins?

Endotoxins are components of the outer membrane of Gram-negative bacteria that can trigger immune responses in humans and animals.

What are the common examples of fungi in microbiology?

Common examples of fungi include yeasts like Saccharomyces cerevisiae and molds such as Penicillium.

What is a pure culture?

A pure culture consists of a single type of microorganism, essential for studying characteristics and behaviors without interference from others.

How does the temperature affect microbial growth?

Microbes have optimal temperature ranges for growth, categorized as psychrophiles (cold), mesophiles (moderate), and thermophiles (hot).