Pages in this set

Page 1

Preview of page 1
Cell Ultrastructure
Magnification increases the size of an object
Resolution/resolving power ability to distinguish between adjacent points


Table 1-10-2: Microscopes (1)



Feature Optical microscope Electron microscope



Radiation Light Electrons


Magnification 400x (max1500) 500 000x


Resolution 2µm 1nm / 0,001µm
Electrons have a small
wavelength
\ Higher resolution


Vacuum in microscope…

Page 2

Preview of page 2
Found in cells that are making proteins for export (enzymes, hormones, structural proteins,
antibodies)
Thus, involved in protein synthesis
Modifies proteins by the addition of carbohydrates, removal of signal sequences
Phospholipid synthesis and assembly of polypeptides

Smooth Endoplasmic Reticulum (smooth ER)
Have no ribosomes attached and often appear more tubular…

Page 3

Preview of page 3
o Nutrients diffuse through lysosomal membrane into the cytosol

Mitochondria (1µm in diameter and 7µm in length)
Mostly protein, but also contains some lipid, DNA and RNA
Power house of the cell
o Energy is stored in high energy phosphate bonds of ATP
o Mitochondria convert energy from the breakdown…

Page 4

Preview of page 4
- Nucleoli \ Absent \ Present
- Chromosomes (DNA) Single and circular Many and linear

Centriole (for mitosis) Absent Only in animal cells

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »