Lecture 1 Introduction to Microbiology

University:
Kentucky State University
Course:
BIO 317 | Medical Microbiology
Academic year:

2021
Views:

135

Pages:

3
Author:

kundgetanufv

Medical Microbiology Lec:1 Introduction to Microbiology Introduction  Every living organism falls into one of two groups: eukaryotes or prokaryotes. Cellular structure determines which group an organism belongs to. In this lecture, we will explain in detail what prokaryotes and eukaryotes are and outline the differences between the two. Prokaryote definition  Prokaryotes are unicellular organisms that lack membrane-bound structures, the most noteworthy of which is the nucleus. Prokaryotic cells tend to be small, simple cells, measuring around 0.1-5 μm in diameter. Prokaryotic cell features Nucleoid: A central region of the cell that contains its DNA. Ribosome: Ribosomes are responsible for protein synthesis. Cell wall: The cell wall provides structure and protection from the outside environment. Most bacteria have a rigid cell wall made from carbohydrates and proteins called peptidoglycans. Cell membrane: Every prokaryote has a cell membrane, also known as the plasma membrane, that separates the cell from the outside environment.

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