Prokaryotic cells

Question 1

Light microscope cons

Answer 1

-limited light resolution by the wavelength of visible light (400-700nm)
-limited to 1000x
-nothing gained by increasing magnification

Question 2

Electron microscope pros

Answer 2

-much higher resolution (shortest distance between 2 points that can be distinguished)
-shorter wavelength (2-12pm) therefore higher resolution
-0.00001mm, 0.001 um, 1nm
-ultrasturcture of cells can be seen
- can see viruses and bacteria

Question 3

Compartmentalization

Answer 3

Prokaryotic cells have a simple cell structure without compartmentalization

Question 4

Nucleoid

Answer 4

region containing a single, free, DNA strand

Question 5

Ribosome

Answer 5

Site of protein synthesis

Question 6

Flagella

Answer 6

enlongated, unflezible, corckscrew shape, resembles pili, made to move cell

Question 7

Binary fission

Answer 7

Prokrayotes form of division (asexual)

Question 8

Binary fission steps

Answer 8

1) DNA is replicated semi conservatevley
2) The 2 DNA loops attach to the membrane
3) The membrane enlongates and pinches of (cytokinesis) forming 2 separate cells
4) The 2 daughter cells are genetically identical (clones)

Question 9

Prokaryotic DNA

Answer 9

• circular DNA molecule
• naked-not associated with proteins
• plasmid often present
• one chromosome only