2005_campbl06

2005_campbl06 - Important Point: Surface-to-Volume Ratio...

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

View Full Document Right Arrow Icon
1 Chapter 6: A Tour of the Cell Important Point: Most Cells are Small Note relative size of bacteria (~1/10 size of animal/plant cells) Frog eggs 100-times & chicken egg 1000- times larger than most plant and animal cells Note relative size of nucleated cells Note relative size of viruses (~1/1000 size of animal/plant cells) More Size Comparisons “…any one cel embodying as it does the record of a bil ion years of evolution, represents more an historical than a physical event…. You cannot expect to explain so wise an old bird in a few simple words.” Max Delbrück (as quoted by Stent, in Max Delbrück, 1906-1981, 1982, Genetics 101:1-16) Cells are membrane -enclosed, DNA- containing, metabolizi ng, and self- replicating Surface-to-Volume Ratio Rate of “stuff” movement across membranes can be limited by amounts of membrane: solved by smaller cells or with more membrane A Prokaryotic Cell No nucleus Typically no membrane- bound organelles
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Plasma Membrane Surrounds cytoplasm, a.k.a., cytoplasmic membrane More in Ch. 7 Defines the limits of individual cells An Animal Cell (typical) See (and memorize) p. 100 for descriptions A Plant Cell (typical) See (and memorize) p. 101 for descriptions You should know what all of these things are as presented in these figures in your book Compartmentalization ± Eukaryotic cells are full of membrane- enclosed compartments ± These separate incompatible chemical and physical conditions ± That way, for example, proteins can be both synthesized and hydrolyzed within
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/03/2011 for the course BIO 113 taught by Professor Swenson during the Spring '08 term at Ohio State.

Page1 / 8

2005_campbl06 - Important Point: Surface-to-Volume Ratio...

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