BI110 Lecture Notes - Lecture 7: Antimicrobial Resistance, Dna Replication, Cellular Respiration
Bi110
Lecture 7
September 23rd, 2016
Module 13
Prokaryotes and Eukaryotes
• All types of cells share basic features:
o Plasma membrane
o Cytoplasm: refers to everything inside the plasma membrane
▪ Cytosol: component of cytoplasm; aqueous solution inside. The
matrix everything else is floating in.)
▪ Organelles (Eukaryote. Vs. prokaryote): these are floating in
the cytosol.
▪ Cytoskeleton: collection of structural proteins, giving the shell
its shape and allowing them to move. All cell types have these
cytoskeleton proteins
o DNA organized into chromosomes (replication): structure and
arrangement can be different, but they all have chromosomes that
have to undergo DNA replication.
o Basic cellular functions: these 2 are common between cell types
▪ Electron transport chain: important for cellular respiration
▪ Transcription and translation (ribosomes): To get from DNA to
protein so DNA can be transcribed into RNA. FUNDAMENTAL
PROCESSES. Translation happens on ribosomes.
Prokaryotes
• Before nucleus
• 2/3 of the domains of life are exclusively prokaryotic
• Ex; e. coli
• DNA is folded into a structure forming a structure called a nucleoid
• DNA of prokaryotes is a circular chromosome that is all twisted to fit into the
cell
• One single chromosome is the entire genome
• In addition to their genome, they can have extra chromosomal pieces of DNA
called plasmids
• These can usually hold less than 10 genes, forming some sort of functional
property to the host cell
• They are not critical to survival but provide additional function, commonly
antibiotic resistance
• Plasmids are very easily shared between bacteria, which is why the antibiotic
resistance genes hook up with bacteria
Typical Eukaryotic Cell
• Similar structure with the addition of the nucleus
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Prokaryotes and eukaryotes: all types of cells share basic features, plasma membrane, cytoplasm: refers to everything inside the plasma membrane, cytosol: component of cytoplasm; aqueous solution inside. The matrix everything else is floating in. : organelles (eukaryote. Vs. prokaryote): these are floating in the cytosol: cytoskeleton: collection of structural proteins, giving the shell its shape and allowing them to move. Individual organelles can be isolated from eukaryotic cells: differential velocity is a way to isolate different components of eukaryotic cells. Prokaryotes(cid:495) genetic information: contain their genetic information, on one circular chromosome within a nucleoid and, on plasmids that can be transferred among individuals through a process called conjugation. What about synthetic cells: stories about when they first reported synthetic cells, * review the links on the slides * Ribosomes: unifying feature of all cell types, bacterial, archaeal, and eukaryotic are all slightly different.