Cells Project Internet Resources
of the light microscope
The microscope has become one of the most recognizable symbols
of science. This paper covers the early history of the microscope,
starting with use of a simple lens in ancient times, to the first
compound microscope circa 1590, up to the microscopes of the 19th
II: CELLULAR ORGANIZATION
Welcome to an On-Line Biology Book Table of Contents. Click on
the underlined items to go to those chapters. The text items are
modified lecture outlines I have developed over the many years of
teaching freshman-level biology. Use for educational purposes is
encouraged and appreciated. Many illustrations are taken off the
web, and I have indicated the source page (when that page still
is an active link) and tried to provide a link back to the original.
The CoopBIODIDAC, formed in February 1999, is opened to a larger
audience. If you want more than images and are willing to contribute
some teaching material, the CoopBIODIDAC could help you do great
This tutorial explores combinations of fluorescence microscopy
with additional contrast-enhancement techniques using both phase
contrast and differential interference contrast (DIC) methods.
This is an incredible site! Dennis Kunkel Ph.D. is an award winning
photomicrographer with technical training in many types of microscopy
(optical, transmission & scanning electron, and specialized microscopies).
His professional background includes 25 years of research in botany,
zoology, microbiology, and neurobiology
Welcome to the Bowdoin Introductory Biology webpage, designed to
help students in Bio 104 with comprehending the basics of biology.
Obviously, this page is not meant to replace going to class but
is simply meant to act as a supplement to the material presented
by Professors Johnson and Phillips. The class is divided up into
the general topics that you will cover over the course of the semester,
withy each topic including helpful instructional tools, web links,
previous class exam questions and lecture notes. I hope this site
helps you this semester
The Virtual Cell Web Page: Chapter
Three: Cell Biology
Check out the cell above. Like all cells it has three main areas:
The cell membrane, the cytoplasm, and the nucleus. You can investigate
any one of these areas. If you know nothing about the structure
of the cell it would probably be smart to go through the pages in
the order presented. (just like you would read your regular text
book). If you are looking for a particular topic go to the index
below and click directly on that topic.
Haven Teachers Institute, The Cell
This unit on the chemistry of the cell is being developed in order
to aid the students with limited backgrounds in verbal skills, reading
skills, and writing skills to understand.
RNA, Protein synthesis: The Revolution in Biology
The genetic material is DNA. The determination of the Structure
suggested how DNA might serve as genetic information. Proof that
DNA served as a template for DNA Replication confirmed these ideas.
Meselson and Stahl in 1957 gave experimental evidence that each
DNA strand served as a template for new synthesis, a process called
A visual tour inside the cell that highlights each organelle.
Center for Algal Microscopy and Image Digitization
This Page is the "Gateway" to our archive of 185+ digitized images.
The archive consists mostly of light images of cleaned diatoms generated
by myself and Rex Lowe. There's also an archive of diatom scanning
electron micrographs. The light images are archived by collection
site. Any image may be freely used for educational and noncommercial
purposes, however, we do reserve all commercial rights.
Biology interactive testing, lessons, video, images, and discussions.
This web page provides local and distant links to resources for
students studying cell structure and function. While some students
using this webpage are students in courses taught by Dr. Randall
Oelerich (creator and webmaster of this site), anybody is encouraged
to make use of the resources here.
Structure and images
Study outlines, practice exams, interactive quizzes, message boards,
chat, clip-art, images, tutorials, and many other resources to help
students learn and teachers teach.
CELLS alive! :
CELLS alive! is provided free of charge for your unlimited online
use. Students and teachers are encouraged to incorporate individual
images in class reports, projects, homework, and lectures.
CELLS alive! is ©Quill Graphics in Charlottesville, Virginia USA,
providing stock video microscopy of living subjects for educational
and broadcast use. The CELLS alive! stock video library includes
footage related to microbiology, cell biology, aquatic protozoa,
water-borne parasites, infectious disease, and immunology.
Scientific estimates place the origin of the Universe at between
10 and 20 billion years ago. The theory currently with the most
acceptance is the Big Bang Theory, the idea that all matter in the
Universe existed in a cosmic egg (smaller than the size of a modern
atom) that exploded, forming the modern Universe.
by David J. Bogler Division of Biological Sciences The University
of Texas at Austin
1 Types of Cells
The major differences between Prokaryotic and Eukarotic cells are
that prokaryotes don't have a nucleus and rarely have membrane bound
organelles, (the only exception I have heard of is bacteria with
vacuoles). The both do have DNA for genetic material, have a exterior
membrane, have ribosomes, accomplish similar functions, and are
very diverse. For instance, there are over 200 types of cells in
the human body, that very greatly in size, shape, and function.
2 Parts of the cell
2.1 Phospholipid-Cell Membrane
The phospholipid bilayer which the cell membrane is an example
of, is composed of various cholesterol, phospholipids, glycolipids
and proteins. Below is an example of a simple phospholipid bilayer.
of Prokaryotes and Eukaryotes
There are two general classes of cells: prokaryotic and eukaryotic.
The evolution of prokaryotic cells preceded that of eukaryotic cells
by 2 billion years.
The type of cell used for this project is a stereotypical plant
cell (shown above). The entire cell is surrounded by a cell wall,
a stiff layer of cellulose. Immediately inside the cell wall, also
encompassing the cell, is the cell membrane. Immediately inside
of that are the various Other cell sites, with actual pictures of
what a plant cell looks like, are a available.
Electron Micrography images
Good source for images of cells as well as images of scientists.
ENTIST Library: Cell Biology
In our excursions around the web we have come across more than
a few exemplary sites that are not only educational, but fun and
interactive. We list sites specifically dedicated to science education
and the development of science fair projects. Links are also organized
relative to specific branches of science such as chemistry and physics.
Within each page sites have been organized into five groups.
Cells, DNA and You
All lessons are provided in our lesson plan format and are designed
for you to easily use. Overheads and handouts necessary to complete
each lesson are included at the end of each document. We encourage
you to duplicate each lesson for educational purposes. You may download
an individual lesson by scrolling to the end of that lesson's web
page and clicking on the lesson title.
Mitosis is the process by which cells divide. The parent cell has
already duplicated its chromosomes , providing both daughter cells
with a complete copy of genetic information.
Image Archive - Home
The Marshall Space Flight Center's Microgravity Science Image Archive
cantains images associated with microgravity science experiments.
This archive is part of NASA's ongoing effort to track and house
science data generated during microgravity flight experiments.
This is a transmission electron micrograph of tissue removed from
the small intestine of a mouse and magnified approximately 26,000
times. Note that at least portions of 3 cells (A,B, and C) appear
in the micrograph. Micrograph courtesy of Dr. Kit W. Lee, UNL School
of Biological Sciences.
Soup - Mendel's Discoveries
MENDEL chose a common garden pea (Pisum) for his first experiments
in hybridisation. These plants exhibited what are now called "Mendilian
Traits" - traits which occur in a very simple form. A simple trait
in an organism is one which occurs either in one variation or another,
with no in-between.
- The Story of Mendel
It -- Graphics for Bio Teachers
This site is for biology teachers who want to tap the graphic resources
of the internet but don't have a lot of time to surf. It's not meant
to be comprehensive. It's only meant to bring you the best images
to help make your teaching more effective.
The Bioactive Site
The Bioactive Site is an ongoing project of Dr. Rick Hershberger,
Assistant Professor of Biology at Carlow College in Pittsburgh,
Pennsylvania. It is my collection of lecture notes, lab activities,
learning materials, courseware, and web links for learning and teaching
biology. Please feel free to e-mail me (firstname.lastname@example.org)
with any comments, suggestions, or questions you have. Visit my
home page, The Professor's Office, for my online teaching portfolio.
I hope you find the Bioactive Site useful and informative.
Biology Project Biochemistry
Welcome to The Biology Project, an interactive online resource
for learning biology developed at The University of Arizona. The
Biology Project is fun, richly illustrated, and tested on 1000s
of students. It has been designed for biology students at the college
and high school level, but is useful for medical students, physicians,
science writers, and all types of interested people.
Cell Cycle & Mitosis Tutorial
The nucleus is a membrane bound organelle that contains the genetic
information in the form of chromatin, highly folded ribbon-like
complexes of deoxyribonucleic acid (DNA) and a class of proteins
Cell Biology is a multidisciplinary Ph.D Graduate program at The
University of Texas Medical Branch., Galveston, Texas. This Program
is part of the Graduate School of Biomedical Sciences. The academic
program provides training in a variety of disciplines using experimental
approaches in Cell and Molecular Biology
Welcome to The Cell web site. Enter this realm of microbiology
carefully, for the motive behind every exciting page is to educate
you about the world of cells!
The Centre for Microscopy and Microanalysis is an interdisciplinary
research and service facility dedicated to an understanding of the
structure and composition of all materials at atomic, molecular,
cellular and macromolecular scales .
Index - Cells
Educators and students can stop here for valuable, relevant information
about teaching and learning developmental biology-from the kindergarten
through college levels. Sections cover books, videos, and CD-ROMs;
courses and resources on the web; labs; "Ask a Developmental Biology
Question"; exam questions, and hints to enliven lectures. This is
the Education section of the main web site for the Society for Developmental
IN AND OUT OF CELLS
Here are some hints for navigation: the general way of moving around
the cell is by clicking it with your mouse when moving forward,
make sure you have the intended action selected (e.g. choose Cut
if you want to see the inside of the cell) before clicking the image
if you do not want to jump to a specific view, make sure Search
window says: nothing you can move back with your browser's Back
or Go command
This schematic represents an idealized animal cell, e.g., a liver
cell. The columns to the left and right of the labels contain links
to discussions of the particular structures