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Inside the Living Cell

The series can be used as an introduction to our in depth cell biology program, Visualizing Cell Processes. Students learn how cells carry out the fundamental processes of life. The menu structure offers over 30 learning chapters that can be discussed and repeated as needed to assure that everyone is up to speed on the content.
The Cell - Unit of LifeRunning Time: 0:14:00

Chapter 1: The Discovery of Cells Chapter 2: Cell Structures Chapter 3: DNA Directs Cell Activities Chapter 4: Electron Microscopes Make New Discoveries Chapter 5: The Chemistry of Life

Chapter List
1.) Chapter 1: The Discovery of Cells
00:03:47Shows how to easily create a "Leeuwenhoek" microscope of the kind used 300 years ago to discover single cells living in pond water, and how Robert Hook coined the term cell, through the examination of a thin slice of cork.
2.) Chapter 2: Cell Structures
00:02:33Shows a cell's functional regions: the plasma membrane, through which all materials must pass, the nucleus containing DNA (the cell's instruction book), and the cytoplasm, containing the various cellular organelles including mitochondria(the cell's power plant where cellular respiration occurs) and chloroplasts. Chloroplasts use solar energy to manufacture fuel molecules and the building blocks for other molecules that cells require -- the process of photosynthesis. The products of one process
3.) Chapter 3: DNA Directs Cell Activities
00:02:02Shows that DNA is the molecule that contains the genetic information units called genes. Among other functions, genes spell out the amino acid sequences for specific proteins. In addition to their structural uses, specific proteins act as catalysts that promote all of the reactions that produce life.
4.) Chapter 4: Electron Microscopes Make New Discoveries
00:01:50Electron microscopes, developed in the 1940s, showed that cell organelles such as chloroplasts and mitochondria had elaborate sub-structures related to their biochemical functions. It showed that bacteria had a much simpler make up than nucleated cells. We now refer to bacteria as "prokaryotic cells" and nucleated cells as "eukaryotic cells."
5.) Chapter 5: The Chemistry of Life
00:03:46Shows that all life is based on carbon with its four bonding sites and how that element enables the generalized structure of carbohydrates, fats, proteins, and nucleic acids (DNA and RNA). This "macromolecules" are broken down into their building block units through digestion. Cells can then use the building blocks to build their own carbohydrates, fats, proteins and DNA.
The Outer EnvelopeRunning Time: 0:14:00

Chapter 1: Membrane Structure Chapter 2: Membrane Behavior and Cell Walls Chapter 3: Osmosis Chapter 4: Transport Proteins Chapter 5: Endocytosis

Chapter List
1.) Chapter 1: Membrane Structure
00:02:06The plasma membrane consists of but two layers of lipid molecules that are in constant motion, shifting and trading places thousands of times a second. In this thin sea of lipids float a variety of proteins that provide channels for larger molecules to enter and leave the cell.
2.) Chapter 2: Membrane Behavior and Cell Walls
00:01:12Biological membranes are self-sealing, expandable and easily merge with similar membranes. Many processes rely on these physical properties as we see in the daily life of an amoeba. Plants surround their plasma membranes with a tough cell wall made of cellulose.
3.) Chapter 3: Osmosis
00:04:13Water molecules move through the plasma membrane whereas larger molecules can not. Within the cell, water molecules are slowed, losing kinetic energy. Typically, water molecules rush in until a balance is reached. This phenomenon is shown in red blood cells that swell to rupture when surrounded by distilled water. Fresh water Protists have specialized organelles that remove the excess water entering their cell by osmosis. The opposite occurs when a cell's surroundings contains the greater c
4.) Chapter 4: Transport Proteins
00:01:40Several different kinds of proteins provide channels through the shifting lipid layers. Some allow large molecules to move from areas of greater concentration to areas of lesser concentration, a process called Facilitated Diffusion. Other transport proteins use energy to pull molecules across the membrane, a process called Active Transport.
5.) Chapter 5: Endocytosis
00:04:30Endocytosis (cell eating) is of three kinds. Phagocytosis the engulfment of solid particles. Pinocytosis (cell drinking) refers to the intake of molecular soups through tiny pockets in the membrane, and receptor mediated endocytosis, a process in which receptor molecules fish for specific kinds of substances such as hormones, transporting them into the cell.
How Cells Obtain EnergyRunning Time: 0:13:00

Chapter 1: Introduction Chapter 2: How Cells Obtain Energy Chapter 3: Mitochodria: Powerhouses of the Cell Chapter 4: The Role of Oxygen Chapter 5: Photosynthesis Chapter 6: Chloroplast Structure Chapter 7: The Light Reactions of Photosynthesis Chapter 8: The Light: Independent Reactions of Photosynthesis Chapter 9: Summary

Chapter List
1.) Chapter 1: Introduction
00:00:56An organism's entire energy budget is spent on the cell level. The kind of energy cells used is chemical bond energy - the shared electrons that hold atoms together in molecules.
2.) Chapter 2: How Cells Obtain Energy
00:02:01ATP, the Energy Carrier. Most cell processes use the same energy source, the rechargeable energy carrier -- adenosine triphosphate (ATP), made by coupling a third phosphate group to adenosine diphosphate (ADP). This third phosphate is held on by a high energy chemical bond that can be donated to other chemical reactions, freeing the end phosphate. That leaves ADP, ready to be recharged, a process that takes place in a particular cell organelle -- the mitochondrion.
3.) Chapter 3: Mitochodria: Powerhouses of the Cell
00:02:25Mitochondria are the powerhouses of the cell. The nucleated cells of animals and plants all contain mitochondria, the tiny bodies where ATP is synthesized from ADP. A mitochondrion has an inner and outer membrane -- a sac within a sac. Folds in the inner sac increase the surface area for chemical reactions that produce ATP. This How Cells Obtain Energy clip illustrates how this process occurs.
4.) Chapter 4: The Role of Oxygen
00:02:24The role of oxygen in cellular respiration.
5.) Chapter 5: Photosynthesis
00:00:47In How Cells Obtain Energy the photosynthesis clip, we see that in terms of getting energy, the only real difference between plants and animals is that plants make their own fuel molecules, where as we animals, in order to get fuel for our mitochondria, must eat our green benefactors, or eat something that has.
6.) Chapter 6: Chloroplast Structure
00:01:08Chloroplasts are the cell organelles (found in plant cells and green algae) where photosynthesis takes place. The electron microscope shows that chloroplasts contain stacks of hollow discs called thylakoids, covered by carpets of chlorophyll molecules. Here, light energy is converted into chemical energy -- a process that drives the living world.
7.) Chapter 7: The Light Reactions of Photosynthesis
00:01:12The chemical reactions of photosynthesis can be divided into two parts: The "light reactions," where water is split into oxygen (given off as a waste product) and hydrogen ions. At the same time, light energy is converted into electron energy by the carpets of chlorophyll molecules. The energized electrons and the hydrogen ions are used in a process that creates ATP and other energy carriers.
8.) Chapter 8: The Light: Independent Reactions of Photosynthesis
00:01:01The "light independent reactions" use these energy carriers to make food molecules (sugars) using atmospheric carbon dioxide as a carbon source. The animated clip shows how the two parts of photosynthesis combine to produce carbohydrates.
9.) Chapter 9: Summary
00:01:23How Cells Obtain Energy is summarized for quick review in this clip.
How Cells Are ControlledRunning Time: 0:12:00

Chapter 1: Enzymes, Life's Catalysts Chapter 2: How Enzymes and Other Proteins Are Made Chapter 3: Turning on Bacterial Genes

Chapter List
1.) Chapter 1: Enzymes, Life's Catalysts
00:04:09A few drops of hydrogen peroxide (H2O2) on a small wound demonstrates enzyme action, as the enzyme Catalase, found in all animal tissues, breaks down the H2O2, into water and a torrent of oxygen bubbles. A cube of liver shows an even more dramatic response, until the temperature is raised to 50 degrees C, at which point the enzyme is destroyed and the reaction stops.
2.) Chapter 2: How Enzymes and Other Proteins Are Made
00:05:19Revealing animation shows how proteins are assembled from just 22 amino acid building blocks. The gene for a particular protein is a sequence of chemical codes on DNA. The code is transcribed onto a messenger-RNA which leaves the nucleus and is used as the instruction tape in a protein assembly line. An abundant cell organelle, the ribosome, is used as the instruction tape in a protein assembly line. An abundant cell organelle, the ribosome, is the protein-making machine where amino acids, carr
3.) Chapter 3: Turning on Bacterial Genes
00:02:56Yogurt, a favorite snack, contains bacteria that break down milk sugar. The enzyme that does the trick is specified on a section of DNA - the gene for the milk sugar-busting enzyme. At the head of the gene is a collar that prevents the gene from being transcribed into messenger-RNA, that is, until a mild sugar molecule makes contact, releasing the molecular collar. Now the gene is transcribed, the enzyme is manufactured, and milk sugar is broken down into simple sugar molecules. That's how gene
How Cells ReproduceRunning Time: 0:14:00

Chapter 1: How Cells Reproduce Chapter 2: DNA Structure Chapter 3: Mitosis Chapter 4: Mutation and DNA Repair

Chapter List
1.) Chapter 1: How Cells Reproduce
00:02:11DNA is composed of just four building block molecules called nucleotides: Adenosine, Guanine, Thymine and Cytosine; A, G, T and C for short. A nucleotide is made up of three components: a sugar, a phosphate, and a nitrogenous base. In the twisted DNA ladder A only bonds with T and G only with C. The sides of the ladder are made up of phosphate-sugar-phosphate-sugar-phosphate sugar units. Unlike the cross links that form between nitrogenous bases (the rungs), the rails are held together by
2.) Chapter 2: DNA Structure
00:04:15During the process of DNA replication enzymes break the cross links producing two half-ladders (two single strands of DNA). Under the influence of an enzyme, matching nucleotides from the cell's stock pile are coupled on, creating two identical molecules of DNA. When each of the 46 DNA molecules in a human body cell has undergone this process of DNA Replication, mitosis can begin.
3.) Chapter 3: Mitosis
00:03:25Onion roots are fast-growing tissues, and so make a good place to see the stages of mitosis that lead to cell reproduction. Once can see the stained cell nucleus in various stages, and piece the observed stages together into a story that shows how the onion's chromosomes get divided into two identical sets - the complete genetic blueprints for two new onion root cells. Following mitosis, plants, animals and protists each have their own methods of separating into two new daughter cells.
4.) Chapter 4: Mutation and DNA Repair
00:03:49Replicating DNA involves matching hundreds of nucleotides per second so it's not surprising that mismatches occasionally occur (about once in ten thousand matches). Were these mistakes to accumulate the genetic blueprint would become muddled and survival would suffer. To cut down on accidental errors, the DNA is scoured by proofreading enzymes that keep the genetic blueprint in remarkably pristine condition.
Video Programs5
SubjectsScience, Biology
Supplemental Files6
Produced By BioMEDIA Associates
Copyright ©2004 BioMEDIA Associates
Grade Levels10th Grade through Post Secondary
MARC Records for BIL
MARC records for the Full Series BIL, Inside the Living Cell
The Cell - Unit of Life Study Guide
The Outer Envelope Study Guide
How Cells Obtain Energy Study Guide
How Cells are Controlled Study Guide
How Cells Reproduce Study Guide
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