Term
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Definition
structure that carries hereditary info, contains genes |
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Definition
small circular DNA molecule that replicates independently of chromosomes |
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Definition
segment of DNA encoding a functional product |
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Definition
one complete copy of the genetic info in a cell |
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Term
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Definition
nucleic acid of genetic material in all cells and some viruses |
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Term
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Definition
class of nucleic acids that comprises of mRNA, rRNA, and tRNA |
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Definition
site of protein synthesis in a cell, composed of RNA and protein |
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Definition
when the cell elongates and becomes 2 cells |
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Definition
copying DNA in the form of RNA, leaving DNA unchanged; process of synthesizing RNA from a DNA template |
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Definition
replication, transcription, and translation |
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Term
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Definition
use of mRNA to make a protein |
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Term
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Definition
messenger RNA
directs incorporation of amino acids into proteins |
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Term
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Definition
transfer RNA
brings amino acids to the ribosomal site where they are incorporated into proteins |
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Term
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Definition
ribosomal RNA
froms ribosomes |
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Term
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Definition
operator and promoter sites and the structure genes they control;
put several genes under the same command;
not in human cells |
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Term
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Definition
required for transport and metabolism of lactose in e. coli |
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Term
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Definition
codes for components of tryptophan, not used when tryptophan is present |
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Term
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Definition
early metabolite in the pathway;
causes activation of transcription of the genes encoding the enzymes;
STARTS TRANSCRIPTION
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Term
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Definition
excess quantities of the end product of the pathway;
leads to cessation of transcription;
ENDS TRANSCRIPTION |
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Term
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Definition
inhibition of the metabolism of alternate carbon sources by glucose |
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Term
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Definition
sequence of 3 nucleiotides in mRNA that specifies the insertion of an amino acid into a polypeptide |
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Term
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Definition
the 3 nucleiotides by which a tRNA recognizes an mRNA codon |
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Term
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Definition
enzyme that fuses together fragments (Okazaki fragments);
join together 2 large molecules by forming a new chemical bond
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Term
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Definition
allows for relaxing/opening up of DNA at the replication fork, exposing the single strand;
enxyme that hydrolize ATP as they move ahead of the relication fork;
ATP dependent |
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Term
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Definition
short molecules, single strand DNA, that are formed on the lagging strand of DNA replication |
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Term
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Definition
convert RNA into DNA;
only in viruses |
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Term
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Definition
the point where DNA strands separate and new strands are synthesized |
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Term
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Definition
Origin of replication;
where replication always begins in DNA;
here, DNA bulges and creates 2 replication forks |
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Term
Bidirectional Replication |
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Definition
type of DNA replication;
creates 2 replication forks moving in opposite directions |
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Term
Role of Radiation in Mutation |
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Definition
type of mutagen (cause mutation);
2 types: ionizing and non-ionizing;
increases frequency of mutations |
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Term
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Definition
something in the environment that causes mutations |
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Term
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Definition
any cancer causing substance |
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Term
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Definition
procedure using bacteria to identidy potential carcinogens;
looks for damage to bacterial DNA by looking for metabolic activity being affected by mutation/damage to DNA |
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Term
Recombinant DNA Technology |
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Definition
intentional modification of the genomes or organisms by natural and artificial processes for practical purposes;
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Term
Tools for Recombinant DNA Technology |
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Definition
reverse transcriptase
restriction enzymes
vectors
gene libraries |
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Term
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Definition
polymerase chain reaction;
technique using DNA polymerase to make multiple copies(large numbers) of a DNA template in vetro |
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Term
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Definition
separation of substances (DNA) by their rate of movement through an electrical field;
allows scientists to isolate DNA of interest |
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Term
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Definition
collection of organisms that each contain a piece of the DNA from the host you are working with;
may contain all genes of a single chromosome |
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Term
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Definition
nucleic acid molecules that carry DNA into a new host;
best vectors are small
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Term
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Definition
plasmids, viruses, and transposons |
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Term
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Definition
cell whose genetic material is not enclosed in a nuclear envelope |
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Term
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Definition
cell having DNA inside a distinct membrane enclosed nucleus |
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Term
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Definition
one of 5 kingdoms;
most organisms with a prokaryotic cell organization |
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Term
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Definition
one of 3 microorganism domains;
prokaryotic bacteria;
single cell |
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Term
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Definition
study of the cause of diseases |
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Term
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Definition
single strand DNA or RNA;
submicroscopic, parasitic, filterable agent consisting of a nucleic acid surrounded by a protein coat;
use humans as a host |
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Term
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Definition
protein coat of a virus that surrounds the nucleic acid |
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Term
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Definition
proteins that protrude/project from the lipid layer of viruses;
used for recognition and attachment to the host cell |
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Term
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Definition
outermost layer of viruses;
composed of lipids and viral proteins (spikes) |
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Term
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Definition
used to quantify viruses/determine virus concentration;
(plaque = area on plate containing dead viruses)
the number of plaques relates to the number of infectious particles applied to the plate;
how viruses are counted |
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Term
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Definition
piece of protein;
PrP;
infectious agent consisting of a self replicating protein with no detectable nucleic acids |
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Term
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Definition
complete, fully developed viral particle |
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Term
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Definition
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Term
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Definition
when growing viruses, done by taking tissue from liver or animal cell and spread on bottom of a flask;
tissue attaches to the bottom of the flask with addition of an adhesive substance (the monolayer) |
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Term
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Definition
the growth of tissues;
cells separate from the organism |
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Term
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Definition
proteins released & produced by the immune system that attack viruses directly;
can kill viruses |
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Term
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Definition
separation of viral nucleic acid from its protein coat;
capsid coat of virus peels off |
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Term
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Definition
formation of biological viruses during the infection process in the target host cells |
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Term
Zoonosis / Zoonotic Disease |
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Definition
disease that is transimitted from animals to human;
not usually transferred from human to human |
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Term
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Definition
the shape of a virus;
regular polyhefron with 20 identical equilateral triangular faces |
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Term
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Definition
disease caught and transmitted in a hospital;
more prevalent in people that are older people, with weak immune systems, or require hospitalization |
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Term
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Definition
part of the structure of gram negative bacteria (outer portion);
released when bacteria is killed;
very dangerous/toxic;
lipopolysaccharides (LPS) |
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Term
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Definition
toxic chemicals produced & secreted by (gram positive) bacteria;
made from proteins;
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Term
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Definition
type of exotoxin that affects the digestive tract
(Ex: cholera - a water borne disease) |
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Term
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Definition
type of exotoxin that affects the nerve cells |
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Term
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Definition
Robert Kock developed 4 postulates that must be used to prove a certain pathogen causes a certain disease.
1. Observation
2. Isolation
3. Re-infection
4. Re-observation |
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Term
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Definition
scientific study of disease |
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Term
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Definition
temporary presence of microorganisms in/on the body |
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Term
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Definition
organism has invaded the body and has established itself in the body through multiplying and spreading itself |
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Term
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Definition
abnormal condition or function;
results only if invading pathogen alters the normal functions of the body;
referred to as morbidity |
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Term
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Definition
places microorganisms are found on a normal basis;
source of infection |
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Term
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Definition
showing characteristics of life;
living |
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Term
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Definition
Not showing characteristics of life;
nonliving |
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Term
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Definition
humans or other animals in which the infectious agent is growing and reproducing with little or no visible harm to the current hose;
harbors pathogens and transmits them to others |
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Term
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Definition
people or animals that usually have had the disease and the infectious agent is still present within them;
acts as a host without displaying any signs of the disease |
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Term
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Definition
the way in which an infectious organism is spread |
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Term
Direct Contact Transmission |
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Definition
person to person or reservoir to person;
Ex: handshaking, kissing, sex;
Ex: common cold, tuberculosis, measles, chicken pox |
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Term
Indirect Contact Transmission |
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Definition
through a fomite (any inanimate object that can carry infectious organisms - germs/parasites)
Ex: towels, door knobs, pencils;
Ex: anthrax, respiratory virus, water borne and food borne disease |
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Term
Droplet Contact Transmission |
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Definition
not airborne;
exposure to liquid droplets from sneeze/cough of infecter person can spread cold or flu virus;
can travel meter or less;
form of indirect contact |
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Term
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Definition
something that carries the organism into your body;
Ex: food and water |
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Term
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Definition
insects that directly deposit organism under your skin;
Ex: flies, mosquitos, ticks, fleas;
Ex: bubonic plague, lyme disease, dengue fever, malaria |
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Term
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Definition
microbes, host, and environment |
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Term
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Definition
disease that is always present in the environment;
low frequency;
Ex: common cold |
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Term
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Definition
spread of a disease throughout the world;
Ex: H1N1 flu virus |
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Term
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Definition
spread of a disease within a country |
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Term
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Definition
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Term
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Definition
disease;
condition of being diseased |
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Term
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Definition
mimic a multiple attack of several different organisms simultaneously;
overactivation of the host immune system;
can cause stress on the organism |
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Term
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Definition
organisms living close together and interacting with each other;
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Term
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Definition
interaction where one organism feeds off the other and the otehr is harmed but not necessarily killed;
symbiotic relationship |
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Term
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Definition
interaction of 2 organisms in which 2 organisms support and benefit each other;
symbiotic relationship |
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Term
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Definition
interaction in which the parasite harms and kills the host;
symbiotic relationship |
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Term
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Definition
interaction where one organism benefits and the other neither benefits or is harmed;
symbiotic relationship |
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Term
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Definition
heavily glycosylated proteins produced by epitheleal tissues in most metazoans |
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Term
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Definition
protein that kills the cell wall of bacteria;
present in bodily secretions (saliva) |
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Term
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Definition
organelle containing digestive enzymes |
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Term
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Definition
engulfment/ingestion of bacteria |
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Term
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Definition
lethal dose;
number of microorganisms it takes to kill 50% pf the infected population |
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Term
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Definition
infectious dose;
number of microorganisms it takes to make 50% of the population sick |
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Term
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Definition
- skin
- mucous membranes (respiratory/GI tract)
- placenta (genital tract)
- parental route
*same as exit |
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Term
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Definition
- skin
- mucous membranes (respiratory/GI tract)
- placenta (genital tract)
- parental route
*same as entry
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Term
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Definition
one of the routes of entry;
when the microorganism bypasses the normal protection/skin;
(ex: injection or cut) |
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Term
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Definition
microorganism that colonize a host without causing disease;
normal flora |
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Term
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Definition
natural population of microorganisms that live on the surface of the skin |
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Term
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Definition
microorganisms that are non-disease causing because of an inability to make attachment proteins or adhesions;
degree of pathogenicity of a microorganism |
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Term
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Definition
relative ability of bacteria to cause disease;
how effective the bacteria are in making people sick |
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Term
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Definition
gel layer that covers and protects the bacteria against phagocytosis;
allows better attachment of bacteria to stick together in a biofilm |
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Term
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Definition
protein that projects from prokaryotic walls;
used for adherance (attachment of microbe/phagocyte to another's plasma membrane or other surface);
also called a Ligand |
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Term
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Definition
present in body, but not within cells;
Advantage: can easily spread through the body;
Disadvantage: constantly being hunted and tracked by immune system |
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Term
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Definition
located within the cells;
Advantage: protected against immune system;
Disadvantage: confined within the cell |
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