Science 1003 self test 5
Viruses which typically have a lipid covering called an ------ are released from the host cell through -----.
envelope, host cell membrane
organisms in which a parasite lives
host
Thermacidophiles thrive in ----- environments.
hot, acidic
The thread-like structures which are the building blocks of fungi are called -----.
hyphae
During a(n) ----- infection by a virus, viral replication is continuing but cells are not rupturing in the ----- cycle.
latent, lysogenic
rupturing of a cell
lysis
All known diseases causued by prions affect the ----- of the host organism.
nervous system
Area of prokaryotic cell that is dense with genetic material
nucleoid
Rickettsia and viruses are examples of ----- which can only replicate inside a host cell.
obligate intercellular parasites
Bacteria which are part of the normal flora cause disease when the immune system is compromised. The ailment is called an -----.
opportunistic infection
microorganisms commonly found living in or on a human
parasite
organism which lives in or on another organism
parasite
Organism which cause diseases
pathogen
----- is the material found in the bacterial cell wall that corms the molecular basis of the Gram stain.
pepdidoglycan
study of algae
phycology
Pathogenic abnormal protein structure
prion
A virion is able to recognize the correct host cell when the ----- of the virion and the ----- of the host cell match up.
receptor site, viral attachment
concentration of salt in water
salinity
Obtain food from dead organic material
saprophyte
mutually positive realationship
symbiosis
Stucture of an alga
thallus
single virus unit
virion
pathogenic RNA molecule
viroid
scientist who studies viruses
virologist
The earths oceans have a salinity of approximately 3.5% while the Dead Sea has a salinity of approximately -----.
30% -35%
----- are spherical bacteria; ----- are rod shaped bacteria; and ----- are spring shaped bacteria.
Coccus, baccilus, spirillum
----- is a group of bacteria that use to be classified as an algae.
Cyanobacteria
----- is composed of large deposits of silicon exoskeletons of members of the phylum Bacillariophyta.
Diatomceous earth
List and describe the steps of a lytic viral replication cycle.
In the first step the virus comesin contact with the host cell and sticks to the cell wall or membrane.Next it has to get inside the host cell. Then it has to get into a place where it will control a host cells manufacturing and assembly. After that, the manufacturing and assembly take place. Last but not least the host cell dies.
One of the limitations of the light microscope is the -----.
Inability to watch live processes
----- is caused by four known Plasmodium species which rely on a mosquito vector.
Malaria
Without free oxygen
anaerobic
Bacteria share genetic material through the process called -----, ------,and -----,
bacterial conjugation, transformation, transduction
