{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lecture 20 - BIO 311C March 3 2008 Exam 2 will be held on...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 311C March 3, 2008 Exam 2 will be held on Friday 7 March in this room The Discussion periods today and tomorrow will be devoted to a review for Exam 2. The last ~15 minutes of Wednesday’s lecture period will be available for you to ask questions about the subject matter covered in Exam 2.
Image of page 1

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

View Full Document Right Arrow Icon
prokaryotic cell animal cell plant cell Biological membranes are essential components of all living cells. Illustrative examples: Two of their most important characteristics are their ability to: 1. physically and chemically separate aqueous spaces from each other, and 2. facilitate the transport of specific kinds of substances from the aqueous space on one side of the membrane to the aqueous space on the other side. *
Image of page 2
Electron microscope picture of a slice through a eukaryotic cell, showing slices through golgi bodies and vesicles. Simplified illustration of the cross-section of a typical biological membrane 8 nm Simplified Cross-sectional Appearance of a Biological Membrane phospholipid molecule Ill ustr a tion of a s lic e t h rough a me mb r ane Textbook Fig 7.2, p. 125 *
Image of page 3

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

View Full Document Right Arrow Icon
hydrocarbon hydrophobic bonding * Hydrophobic bonding only occurs when a nonpolar molecule or a nonpolar part of a molecule is forced into contact with water. water
Image of page 4
From textbook Figure 5.13, p. 76 * Polar head nonpolar (hydrophobic) tails Structure of a phospholipid structural formula space-filling formula illustration
Image of page 5

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

View Full Document Right Arrow Icon
Organization of phospholipids in an aqueous solution See textbook Fig 7.2, p. 125 monolayer of phospholipids floating on top of water * monolayer bilayer of phospholipids immersed in water bilayer Polar lipids form a monolayer on the surface when exposed to aqueous solutions. They may form a bilayer when forced into the aqueous solution.
Image of page 6
I llustration of a Cross-section of a Liposome, an Artificial Membrane-bounded Organelle From: Freeman, Biological Science, Prentice Hall, Pub., 2002 * A liposome is a hollow sphere constructed of a phospholipid bilayer.
Image of page 7

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

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern