Bacteria, viruses, Protists, fungi Flashcards
Anatomy of virus
- Nucleic acid (DNA/RNA)
2. Protein coat called capsid
Why do viruses invade cells
Viruses invade cells because they are in active outside of the host (virions), they lack ribosomes needed for metabolisms and they use the raw materials of the host cell to be able to reproduce
Lytic cycle summary
- Adsorption
- Penetration
- Replication/ maturation
- Assembly
- Lysis and release
Lysogenic cycle
- Adsorption
- Penetration
- Integration
- Spontaneous induction
- Replication/ maturation
- Assembly
- Lysis and release
How are viruses beneficial to humans?
They are beneficial because of genetic engineering – harmless virus carries good genes into cells
What is the basic bacterial anatomy?
DNA region, ribosomes, cell wall, and plasmid
The classifications and shapes of bacteria
Bacillus: rod shaped, coccus: spherical shaped, Spirillium: spiral shaped, Spirochete: wormlike spiral shape
Groupings of bacteria
Diplo: groups of 2/paired, strepto: chains, staphylo: grape like clusters
What are the parts of gram-positive
Steam is purple (crystal violet), thicker peptidoglycan, exotoxin (is released when alive)
Are the parts of gram-negative
Stained pink (safarin), thin peptidoglycan, endotoxins (is released when dies)
What is the part of asexual
Binary fission
What is binary fission, asexual or sexual
Asexual
What are the different parts of sexual
Conjugation, transformation, transduction
What is conjugation, transformation, transduction part of, asexual or sexual
Sexual
What is binary fission
It involves the copying of the DNA and the splitting into two new cells
What is transformation
Bacteria picks up DNA from dead bacteria cells and incorporates it into its own DNA
What is transduction
It uses a virus to transfer DNA from one bacterium to another using bacteriophages
What is conjugation
When bacteria is able to transfer its DNA into another bacteria by means of a pilus/exchange of DNA
What is a sexual reproduction
Binary fission/exact replica
What is sexual reproduction
Exchange of genetic material/conjugation
What kind of reproduction has the exact replica
Asexual reproduction
What kind of reproduction has exchange of genetic material
sexual
When do endospores form
They form when habitat conditions become harsh/little food
What is an endospore
An endospore is a spore that forms when the habitat conditions become harsh: survival mechanism of bacteria