Cell membrane_old

Cell membrane_old - • 5-10 um in size • Spherical...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1) Cell membrane a) Regulate the flow of nutrients and wastes that enter and leave the cel. . b) Contains DNA as its genetic material c) Several varieties of RNA molecules d) Proteins i) Enzymes e) Are composed of the same basic chemicals f) Reproduce and are the result of reproduction g) Require a supple of energy 2) Diversity of molecules a) Cell structure: prokaryotic vs eukaryotic 1) Prokaryotes = no nucleus no RNA processing 2) Eukaryotes = nucleus and RNA processing  3) Organelles are in  eukaryotes but not in prokaryotes 4) Cell well as there in prokaryotes but not in eukaryotes Cell size 1) Cells are very small 2) Small to large as follows 3) Viruses  you need electron microscope 4) Bacteria 5) Yeast 6) Animal cells 7) Multi-cellular organism you can see with naked eye
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Yeast Eukaryotic unicellular organism
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • 5-10 um in size • Spherical cylindrical or oval in shape • Most common y east used in industry is saccharomyces cerevisiae o Under aerobic conditions used as a bakers`yeast o Under anaerobic conditions used for alcohol production Protozoa • Unicellular motile relative large 1-50um eukaryotes that: o Lack cell wall • They cause a number of human diseases eg malaria • But many of them have beneficial roles eg digestion • Removing bacteria from waste water What are viruses?? • Nucleic acid genome: o Dna and rna • Protein coat o Protection, entry into the cell o LIPID ENVELOPE IN SOME VIRUSES o SMALL o 10-400nm o Obligate intracellular parasites o Not considered as life •...
View Full Document

This note was uploaded on 04/17/2008 for the course BIOL 1010 taught by Professor Anafi/quinlan during the Winter '08 term at York University.

Page1 / 3

Cell membrane_old - • 5-10 um in size • Spherical...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online