Biology 100/101, Fall 1997
Lecture 6:
Cellular Basis of Life

Text Readings
in Lewis
Review questions "To think about"
Chapter 4
Pages 59-75 & 79-81
Chapter 5,
Pages 81-102 & 106-107
Page 81
Questions 1-3, 5, & 10
Page 107 , Question 5
Page 82
questions 4, 5, & 6

Objectives:
After studying this material you should be able to:

  1. Explain how a single cell meets the basic criteria that differentiate living organisms from nonliving objects or chemical reactions.

  2. Draw sketches of common prokaryotic, plant, and animal cells.

  3. Label the membrane systems, organelles, and other components of each type of cell in your drawings.

  4. Describe the basic structure of the membranes in the cells you have drawn and describe the roles of these membranes in determining the organization and functions of cells and their organelles.

  5. Describe the function of each membrane system, organelle, and other cell component in the performance of the life functions of each of the three basic types of cells. (Use the lists of life characteristics of living organisms and cell membrane systems, organelles and components following the objectives.)
  6. Describe the role of each cell organelle and membrane system involved in the production and secretion of milk from a mammary gland cell. (Read the text section "Making Milk starting on pg 69 of Lewis' text. Understand the relationships among the organelles illustrated in figures 4.11, pg. 70 and 4.12, pg. 71)


Characteristics of Living Organisms
_________________________
  1. Life is organized

  2. Life requires energy

  3. Living things must maintain an internal constancy
    -homeostasis: the ability to maintain chemical constancy (i.e., to stay the same)

  4. Living things react to environmental change (i.e., their surroundings)

  5. Living things reproduce, grow, and develop

  6. Living things adapt

Cell Membrane Systems,
Organelles, and Other Components
___________________________________
cell wallplasma membrane
phospholipid bilayermembrane proteins
fluid mosaic
membrane model
peroxysomes
nucleusnuclear membrane (envelope)
nuclear poreschromosomes
DNAnucleolus
receptor proteinsgolgi bodies
vesiclesmitochondria
chloroplastsribosomes
endoplasmic reticulum (ER)lysosomes
cytoskeletonmicrotubules
vacuole

Cell Biology Links

Links to these resources are also included in the outline below.

The Virtual Cell being developed by Mat Lexa right here at the U of I.

Cells Alive!

7.01 Hypertextbook Cell Biology Chapter
from The Experimental Study Group, Massachusetts Institute of Technology

The WWW Cell Biology Course

Dictionary of Cell Biology


Cells as the "Basic Unit of Life"

Prokaryotic Cells

Eukaryotic Cells