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NS 1011B: Introduction to Biology: Cells and Organisms

Spring '08 Syllabus

Week 5 Schedule

February 18 - 22

Monday Tuesday Wednesday Thursday Friday

18

NO CLASSES

Long Weekend

19

Office Hours:

Workshop: Writing lab reports

20

Cells

Intro to cells: cell size, surface-to-volume ratio

 

Membranes:

Lipid bilayers

Membrane models

21

Lab: Biochemistry of Cells

22

Prokaryotes

Eukaryotic cell structure:

Cell Tour

 

Homework This Week:

For Wednesday, Feb. 20
 Read ch. 4.1-4.2, pages 69-76.

Answer the following questions (also available as a Word document in the class shared folder):

  1. One of the tenets of cell theory is that "Cells arise only by division of a previously existing cell."  Louis Pasteur did an experiment to demonstrate that life does not arise spontaneously.  Read the information at this link, and explain Pasteur's experiment.
     
  2. "Most cells are small because larger cells do not function as efficiently."  Why don't larger cells function efficiently?
     
  3. What is the major component of membranes?  What is a bilayer?
     
  4. What is one function of transmembrane proteins?
     
  5. Why do you think the current model of cell membranes is called the fluid mosaic model?  HINT: what does mosaic mean?  What about a membrane is fluid?
     
  6. Draw a diagram of a cell membrane.  Label all the parts.
     
  7. What type of protein is defective in cystic fibrosis patients?

For Friday, Feb. 22
Read ch. 4.3-4.9, pages 77-89.

Answer the following questions (also available as a Word document in the class shared folder):

  1. Draw a picture of an animal cell and a plant cell.  Label at least ten parts in each drawing.
     
  2. What are some similarities between animal cells and plant cells?  What are some differences?
     
  3. How are prokaryotes and eukaryotes similar?  How are they different?

For Monday, Feb. 25
 Complete any parts of the Cell Tour which you did not complete during class.

Read ch. 4.10 - 4.12, pages 90 - 98.

Answer the following questions (also available as a Word document in the class shared folder):

  1. Why do molecules move down a concentration gradient?
     
  2. What happens if a cell is placed in a hypotonic solution?
     
  3. Draw a picture showing the process of endocytosis.
     
  4. How is active transport different from facilitated diffusion?

 

Vocabulary This Week:

cell

cell theory

surface-to-volume ratio

cytoplasm

plasma membrane

phospholipid

lipid bilayer

fluid mosaic model

membrane protein

cell surface protein

transmembrane protein

prokaryote

eukaryote

organelle

nucleus

  • nuclear envelope

  • nuclear pore

  • nucleolus

endoplasmic reticulum, ER

rough ER

smooth ER

Golgi complex

vesicle

lysosome

peroxisome

mitochondria

chloroplast

endosymbiosis

cytoskeleton

microfiliments

microtubules

intermediate fibers

centrioles

flagella

cilia

central vacuole

contractile vacuole

cell wall

extracellular matrix

 

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