Ch 1.1 General properties and types of cells Flashcards
1
Q
What is the most basic organism
A
Cell
2
Q
3 elements of cell theory
A
1) all living things made of cells
2) cells fundamental unit of life
3) all cells come from pre-existing cells
3
Q
3 defining feature of a cell
A
- have DNA
- bound by a plasma membrane for nutrients uptake and signaling
- they metabolize in the cytoplasm
4
Q
Why might Eu have a nucleus
2 points
A
- keep transcription separate form translation
- keep all the molecules needed in the nucleus in a high concentration
5
Q
What cells are bigger
A
Generally Eu is bigger than Bac
6
Q
Describe a Bac cell
4 points
A
- DNA is in a circular chromosome
- no true nucleus, DNA in a nucleotide region (loose)
- less then 10 microns (small)
- rapid growth/division
7
Q
Can Pro be multi/uni cellular?
A
Yes
8
Q
Describe Eu cells
5 points
A
- true nucleus surrounded by a membrane
- can differentiate and are linked to get her in a multicellular organism
- have linear chromosomes
- generally big (10-100 microns)
- membrane bond organelles
9
Q
Is a virus a cell?
A
No
10
Q
Describe viruses
8 points
A
- very small
- infectious
- nucleus acid in a capsid (protein coat)
- sometimes an outer lipid envelope
- need a host to replicate
- have DNA or RNA
- no independent metabolism
- lipid bilaterally envelope
11
Q
How do viruses infect people?
2 points
A
- They bind to the cells surface and insert their genetic material into the cell
- they use the cells machinery to reproduce
12
Q
What is endosymbiosis?
A
One symbiotic organism lives in another
13
Q
Evidence of endosymbiosis for mitochondria and chloroplasts
3 points
A
- surrounded by 2 membranes
- inner membranes resembles certain pro
- have a circular genome code for genes similar to bacteria; uses pro type ribosomes (70s vs 80s Eu ribosomes)
