Year 11 Microorganisms links

All were active on 15/11/11

General information

• CELLS alive - A general microbes information website.
• Microbes and food - Information and illustrations about a variety of microbes and their interactions with food, in producing food, spoiling it and causing food poisoning.
• Infectious diseases – Pathogens - Good overview with structures and functions of microbes and other info. Includes Bacteria, Fungi (yeast), Viruses; (skip Protozoa and Parasites); How pathogens are spread; How pathogens cause disease; Growth of pathogen populations. Has a quiz at the end.

Decomposition and nutrient cycles

• Decay – bacteria and fungi - How decomposers decay things, and how it can be prevented to preserve foods. Info and a Test Bite
• Biological compounds activity - Interactive animation on the carbon, oxygen and nitrogen cycles (after an overview of what is in the organic molecules of proteins, carbohydrates and fats). Supported by the text revision and test here.

Fighting disease

• Infectious diseases – Immunity - Text resource supported by simple animations showing how various components of the immune system work, and also how vaccines work.Sections include: White blood cells / response to infection; Immune memory; Vaccination; (you can safely ignore Monoclonal antibodies). A quiz at the end.
• Defending against infection - Mostly text on bacteria and viruses and fighting disease. Includes a couple of great CG animations on p4 and p5 on how bacteria are fought off by the immune system cells and how vaccination works. Also a bit on antibiotics.
• Infectious diseases and their treatment - This interactive e-source about how the body copes with disease allows you to complete summary sheets to check you progress as you go. Pretty thorough and relevant!
  There are 10 sections in this e-source: Introduction; Pathogens cause disease; Immunity; A bacterial disease – Meningitis; A fungal disease – Candidiasis; A viral disease – SARS; (A protozoic disease – Malaria; you don't need to do this one); Modern medicines of the world; Appendix of diseases; Quiz
• Human immune system - This interactive e-source about the immune system allows you to complete summary sheets to check your progress as you go.
  There are 11 pages in this e-source: Introduction; Pathogens and disease; Barriers to infection; Acquired immunity; Immunisation; Medicines and the immune system; Vaccinations in the UK; Antibiotics; Immune system causes problems; HIV/AIDS; Quiz
• See HIV in action - A huge animation file about how AIDS infects the body, showing the “life” sycle of the HIV virus. Possibly slow to load.
• Making vaccines - An interactive where you follow the instructions to make 6 different types of vaccines. Wicked!
• Fighting back - An interactive animation in which you, playing the role of the immune system, try to figure out how to overcome and infection of the mumps. Also details why AIDS is so devastating.

For interest only: 

• AIDS:The Modern Pandemic - A resource-filled CBS news site detailing the worldwide prevalence of AIDS. Includes some statistics, an animation of how AIDS affects the body, the history of the disease, a photo essay on its youngest victims and much, much more! A fair bit off-topic though. 
• How Herd Immunity Works - Why it is important for everyone who can to be vaccinated. A 10 minute video.

Year 11 Mammals as consumers links

Food and what's in it: focus on carbohydrates, proteins and fats

• Biological compounds activity - Interactive animation that starts with an an overview of what is in the organic molecules of proteins, carbohydrates and fats (and then goes onto carbon, oxygen and nitrogen cycles, which is useful for the Micro-organisms topic).
• Body needs - Are you what you eat? A flash mouse-over animation to investigate your nutritional requirements. Includes details of what you get if you don’t get enough of particular nutrients. Focus on carbohydrates, proteins, lipids
• Diet and Digestion - Includes what’s in food, a nice diagram of the digestive system, an animation of peristalsis and a wee bit about physical and chemical digestion. Has an easy and a hard Test Bite at the end.

Organs in the digestive system (mostly in order of usefulness)

• Digestion - This interactive e-source about food groups and the digestive system allows you to complete summary sheets to check your progress as you go, and there’s a quiz at the end too. Really quite a good overview, so highly recommended.  
• Organs of digestion - animation with good step-by-step descriptions of wha's going on in each organ as food moves through. Was one that went with an activity in your booklet.   
• The digestive system - Short animated movie with narration.
• The real deal on the digestive system - An informative and easy to understand article that leads you through the organs involved. Updated June 2010. Has an animated diagram for a very basic review of structures and functions on page 1. 
• Food processing - Interactive showing basic processes in a highly no-scientific manner. Good reminder about what is digested where, and how, and by what, though. Pretty basic!
• Diet, drugs and health - Very basic overview, maybe even too basic? This Revision Bite covers: Nutrients; Some effects of a poor diet; Digestive system; Digestion and enzymes; Absorption and egestion (plus more).
• The Digestion and Absorption of Fats - Step-through or narrated animation. Warning: Pretty complex and thorough, but shows absorption nicely, and includes villi. Shows roles of bile and lipase acting on fat molecules too. 

Enzymes and digestion

• Enzymes and their uses - Text resource with a few diagrams and animations about enzymes. (Not very interactive!) Includes: Enzymes; Types of enzymes; Enzymes in digestion; The properties of enzymes; How do enzymes work?; Effect of temperature and pH; Uses of enzymes; Immobilised enzymes
• Enzymes - Enzymes in general and their role in digestion too. Test Bites for both.

After food has been absorbed

• Circulation - about the heart and blood vessels, briefly. Not specific to transporting nutrients. 
• Life Processes – Respiration and the role of lungs - A quick text overview of respiration and how the lungs are involved. See pages 3, 4 and 5 only. (The rest reviews muscles and bones). Bit much detail on lungs, but a couple of nice animations showing the exchange of CO₂ and O₂.
• Insulin and Glucose Regulation - How hormones from the pancreas regulate the level of sugars in the blood after and between meals. An 'Extra for experts', definitely. 

Differences between mammals

• A Cow's Digestive System - Explanation of rumination in the first chambers of a cow’s stomach, with animation and narration (as embedded above) 1:35
• Skull science - How the skull shape and teeth relate to the diet of various mammals. A brochure-type resource.

Year 11 DNA replication and cell division

THE STRUCTURE OF DNA AND DNA REPLICATION

• Genes and Inheritance  - A fairly comprehensive review of Year 11 Genetics. Mouseover specific terms to be reminded of definitions. Each page has a quiz at the end to check your understanding. Some interesting applications of inheritance with respect to genetically inherited diseases. A complete quiz at the end.
• Tour of the basics of genetics - Animations to remind you of the structure of DNA and how it works.
• Structure of DNA  - A narrated video to watch. Nice because it shows how the actual atoms in the molecule are arranged. Very complex in the vocab, so at best, just watch the pictures.
• DNA workshop: DNA replication (& protein synthesis) - Interactive animations to review the processes of DNA replication (and protein synthesis). Get involved; it doesn’t take long!
• DNA replication – This animation includes more of the nitty gritty of replication, showing the enzymes that are involved. e.g. helicase, polymerases, ligase.

HOW SCIENTISTS MADE THEIR DISCOVERIES ABOUT DNA

This isn't examined at any level, but it's still interesting!

• Meselson-Stahl experiment: DNA replication - How scientists found out that DNA replicates by unzipping and copying complementary strands.
• Decoding DNA - The science involved in decoding DNA – finding the sequence. More for 13BIO, but interesting nevertheless.
• DNA from the beginning - A huuuuuuge resource including text, animations, and a lot of the science behind the knowledge. Use the menus down the side to navigate through some of the main points of the genetics topic. Of the three main sections, Classical Genetics and Molecules of Genetics are the most relevant.

MITOSIS
Don't worry about the names of stages, just watch what the chromosomes are doing.

Here's a clip of mitosis in 3 dimensions. The narration is complex but the animation is good.

• Mitosis -Narrated and/or step-through animation of mitosis with a quiz at the end.
• Cells Alive - mitosis - Compare a diagram of mitosis with photographs of an actual real cell dividing.
• Mitosis and the cell cycle - Narrated animation and a quiz. Animation is nice but the text level is high.
• Mitosis and cytokinesis - Narrated animation and a quiz. Animation is nice but the text level is high.
• BBC Science: Cell division - Cell division by mitosis, including stages, and then a test.
• Mitosis: Interactive Java Tutorial - Very detailed description of mitosis, and an animation to boot. Not particularly interactive.
• Genetics Review: Mitosis - Brief diagram and text reminder of the names of the stages of mitosis for Year 13.
• Mitosis and cytokinesis - Animation of these processes in a plant cell. High level text. 
• Cell division and cancer - Extra for experts. A somewhat long but good review of cell structure including specialisation, as well as cell division by mitosis (with an animation; no stage names). Includes what happens when cell division goes out of control i.e. cancer. Self-check tests throughout. 

MEIOSIS

Best animation I have seen of the first division, but doesn't feature much detail on the second division.

• Stages of meiosis - Beautifully coloured animation with a quiz.
• Meiosis - Nice animation with stage names and controllable slider. Step-through or narrated.
• Mitosis and Meiosis Comparison 1 and Comparison 2 - Animation is the same for both, but quiz differs.
• Special features of meiosis - Shows crossing over in closer detail as well as highlights the reduction division
• Crossing over interactive - Click through the stages to see how crossing over creates new combination of alleles (using colours, rather than letters, to represent alleles)
• Random orientation of chromosomes during meiosis - Another animation of independent assortment. A pretty one.
• Independent assortment and gamete diversity - An animated and narrated or step-through tutorial and a quiz. Good coverage.

MITOSIS VS MEIOSIS: COMPARISONS

• How Cells Divide: Mitosis vs Meiosis - A brilliant side-by-side animation comparison of these two cell divisions which highlights the differences between them. Stages are named and described but can be ignored for Year 11 and 12. If the flash doesn’t work for you, try the text-only link here.
• Comparison of meiosis and mitosis - Another superb animation of meiosis vs mitosis. This one you can fast forward and rewind easily.