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Chapter 28: Prokaryotes
Outline of Prokaryotes
24
Biology
Undergraduate 2
10/10/2012

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Term
Prokaryote Characterics vs Eukaryotes
Definition
Unicellularity, small cell size, nucleoid region, Mitotic reproduction, non-compartmentalization, 9-2 Flagella, metabolic diversity
Term
biofilm
Definition
community of different species formed by bacteria
Term
chemolithotropy
Definition
use energy stored in chemical bonds of inorganic molecules to synthesize carbohydrates
Term
Archaea characteristics vs Bacteria
Definition
lipid differences in membranes, lacks peptidoglycan, DNA replication more similar to eukaryotes, have more RNA polymerase
Term
Peptidoglycan
Definition
Cell wall component, found in eukaryotes and bacteria
Term
Pseudomurein
Definition
cell wall component found in some Archaea
Term
Forms of Bacteria
Definition
Rod, Cocci, Sprials
Term
Gram-positive
Definition
thicker peptidoglycan wall, stain dark purple
Term
Gram-negative
Definition
contain less peptidoglycan, do not dye purple color
Term
S-Layer
Definition
layer outside of peptidoglycan, or in the case of Archaea, only hard outer layer
Term
Capsule
Definition
bacteria, additional gelatinous layer that surrounds other wall layers
Term
flagellin
Definition
protein that makes up flagella
Term
Pili
Definition
hairlike structures that occur on gram-negative prokaryotes
Term
Endospore
Definition
tick wall around genome, protects from environmental changes as the cell become inactive
Term
Viruses
Definition
molecule of hereditary material with a coat of protein
Term
Viroids
Definition
short strands of RNA, cause crop disease
Term
Prions
Definition
proteins that cause disease. Example: Kuru and Mad Cow Disease
Term
Infectious Proteins
Definition
copies become folded into the wrong shape
Term
Cyanobacteria (bluegreen algae)
Definition
no chloroplasts, just enzymes that make oxygen gas as wasteproduct
Term
Sulfur Bacteria
Definition
use H2S instead of water in photosynthesis
Term
Intestinal Symbionts
Definition
help liberate nutrients and produce vitamin K and B12 (example: termite helpers)
Term
Nitrogen-Fixing bacteria
Definition
used by plants to capture nitrogen.
Term
Decomposers
Definition
important in tropical ecosystems`
Term
Pathogens
Definition
Lyme Disease, Pneumonic plague, Botulism, TB
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