Bacteria
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34 Terms
what do not all bacteria have?
a flagella and a capsule
what do bacteria lack?
a nucleus
what are the two types of cell walls?
gram positive and gram negative
Bacteria have nucleotids. What is a nucleotid?
DNA
bacteria do not have what organelles?
membrane-bound organelles
what do prokaryotes refer to?
the lact of a nucleus (bacteria and archea)
what is the purple line pointing at?
cytoplasm
what is the purple line pointing at?
Nucleotids
what is the purple line pointing at?
pili
what is the purple line pointing at?
plasmid
what is the purple line pointing at?
flagella
what is the purple line pointing at?
capsule
what is the purple line pointing at?
ribosomes
what do ribosomes make?
proteins
what is membrane bound?
chloroplast and nucleus
What can you find in gram positive?
a thicker peptidoglycan layer and LTA (lipoeichoic acid)
what does peptidoglycan do?
makes the cell wall stronger
what is found in gram negative?
a thin peptidoglycan layer and LPS (lipopolysaccharide), outer membrance
what does puptidoglycan have a stronger cell wall help with?
better structural support
how does bacteria reproduce?
asexually via binary fission
what is binary fission?
here a single parent cell copies its DNA and splits into two identical daughter cells
what happens with transcription and translation in bacteria that does not happen in eukaryotes?
it occurs at the same time
is bacteria single celled?
bacteria is single celled, can grow in chains
what bacteria is sphere shaped?
cocci
what bacteria is rod shaped?
bacilli
what bacteria is spiral shaped?
spirochetes
why produce antibiotics?
produce antibiotics for competian and test for sensitivity to find the best antibiotic to reat a specific bacterial infection
what is quorum sensing?
density-dependent cell signaling
As cell increase they produce what?
more quorum sensing molecules, the more bacteria the more molecules
Once cells hit a threshhold what happens?
there is enough QSM around for them to regulate gene expression
What does vibro fisheri do?
emit a protein that produces signals for other vibro fisheri as a form of communication?
How do the communication signals work in vibro fisheri?
they sense other vibro fisheri and turn on bioluminescence
where are vibro fisheri located?
They are on the Hawaiian bobtail squid.
how does the Hawaiian bobtail squid unitlize vibro fisheri?
The squid opens a shutter that houses the bacteria and uses sensors to detect moonlight by matching the downwelling moonlight, allowing it to hide their shadow, creating an anti-predation system (counterillumination)