Biology Test Review Flashcards
Describe viral reproduction
Lysolytic/Lysogenic: reproduce and wait no cell bursting
Lytic: Reproduce & cell bursts.
Step One: bacterial phage attaches and Injects DNA
Step Two: DNA/RNA from virus will with fuse DNA in cell
Step Three: virus DNA is read and virus parts are made and assembled
Step Four: cell bursts and viruses leave to invade other cell
A variety of respiratory diseases in humans can be caused by adenovirus’s.
Describe the structure of an adenovirus
In adenovirus is a nucleic acid core that is surrounded by a protein coat,(capsid)
Where can viruses only reproduce?
Inside a host cell
Name a prokaryote and two eukaryotes
Prokaryote: bacteria
Eukaryote: fungi,Protists
What do all eukaryotic cells have that prokaryotic cells do not?
Membrane-bound organelle’s, a nucleus.
What is a covalent bond
Two electrons that are shared
Describe the electron presents in H2O
Electrons are mostly at the top surrounding the oxygen while there are very few electrons surrounding the two hydrogen atoms
Where is the majority of a negative charge around the water molecule
Around the oxygen
Describe A hydrogen bond
And explain what the cause is between the water molecules
The attraction of hydrogen to oxygen.
The cost of the attractions are like that because the oxygen which is negative attracts the positive which is the hydrogen
What organism has the simplest cellular structure
The bacterium
A scientist discovered a new organism in some caves in Pennsylvania. The organism has the following characteristics:
– it is multicellular
– it’s cells lack cell walls
– it is motile
– it is heterotrophic.
Based on this information, to which Kingdom does the organism belong?
Animalia
Scientists have discovered a new type of organism. To assign the organism to a domain and kingdom, what is most important for scientist to know?
The organisms cell structure
