intro to cmb Flashcards
1
Q
What is a cell?
A
smallest unit of life
2
Q
What is a tissue?
A
Aggregation of similar cells
3
Q
What is an organ?
A
different tissue makes an organ with a specific function
4
Q
what is a systems?
A
organs of related function makes a system
5
Q
What are the 8 basic properties of cells?
A
- small and composed of complex biomolecules
- Can replicate (different from reproduce) themselves
- Can metabolize
- Catabolize: breakdown compounds to produce simpler compounds and energy.
- Anabolize: build molecules required by cells. - Capable of self regulation - Support all its cellular activities needed for survival, e.g. make its own macromolecules, ATPs, regulate own growth, etc.
- Osmoregulate - control what gets in/out of membranes (organelle or plasma)
- Active - involved in numerous mechanical activities such as assembly, disassembly, & movement of organelles
- Respond to stimuli - via cell surface receptors
- Die - absence of life is a most defining characteristic of living.
6
Q
What is the difference between prokaryotes and eukaryotes?
A
- prokaryotes are unicellular but eukaryotes can be both unicellular and multicellular
- prokaryotes do not have membrane bound cell organelles
- prokaryotes do not have a membrane bound nucleus
- prokaryotes have a capsule, pili and flagella but eukaryotes don’t
7
Q
What is the difference between plant cells and animal cells?
A
- Plant cells have a cell wall, but animals cells do not.
- Plant cells have chloroplasts, but animal cells do not
- Plant cells usually have one or more large vacuole(s), while animal cells have smaller vacuoles, if any are present.
8
Q
What is a virus composed of?
A
composed of a core DNA or RNA surrounded by a protein coat.
9
Q
How does virus infect it’s host?
A
- attach to host cell
- enteres cell and release it’s DNA or RNA
- using the host cell’s resources and energy, it produces viral proteins
- virions are released from host cells once it’s matured
