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6.6 Summary of Section 6

  1. The majority of proteins of known function are enzymes. Enzymes are biological catalysts, increasing the rates of reactions. Enzymes are not permanently altered by catalysis of a reaction.

  2. The transition state is an unstable intermediate enzyme–substrate complex in which the enzyme and the substrate are in highly strained conformations.

  3. There are a number of different catalytic mechanisms employed by enzymes including general
    Author(s): The Open University

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Bill Sims Jr in Migration Rhapsody
See the full performance: https://www.youtube.com/watch?v=6e4cvzuHwjg In conjunction with the "One-Way Ticket" exhibition, Terrance McKnight, a host on New York City classical music station WQXR, curates an evening of music and performance with artists including Jim Davis, Kevin Maynor, Karen Chilton, Bill T. Jones, Alicia Hall Moran, Jason Moran, Damien Sneed, Bill Sims Jr., Ricky Gordon, Bob Stewart, and others.
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5.6 A few final thoughts

You will have seen from this section that it is difficult to talk about the heart without also talking about blood and veins and arteries. It is hard to isolate one body system or one body part and describe it by itself, without talking about other parts of the body as well. One of the important points that we would like you to remember about the biology of the human body is that everything is interlinked. An athlete hoping to maximise their performance in a sport has to work on all pa
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Learning outcomes

After studying this course, you should be able to:

  • contrast the physical properties of air and water and describe implications of such differences for aquatic mammals

  • give examples of the adaptations displayed by aquatic mammals that enable them to hold their breath while submerged for relatively long periods

  • describe some of the biological differences between pinnipeds, sirenians and cetaceans

  • discuss the importance of communication
    Author(s): The Open University

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The History of the Periodic Table - Part 1 of 2
This is part 1 of 2 of a video this student did for his Chemistry class back at community college for extra credit. It documents the history of the periodic table. Entertaining and educational and some good background and details.

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How the Iowa Caucus Works
Each U.S. primary election season kicks off in Iowa. Learn the process behind one of the pivotal events of the general election. (02:03)

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International Development: microcredit and migration
What does it mean to be poor, or an immigrant? What form should Aid take? This album begins to explore the complex issues of international development in a globalised world, starting with a look at schemes which attempt to alleviate poverty. Small business owners are empowered by micro-financing in Glasgow, while in Argentina a disastrous economic collapse has led to people taking matters into their own hands by creating an alternative social exchange currency. Migrant communities, such as Greek
Author(s): The iTunes U team

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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

3.5 Benzodiazepine tranquillisers, Prozac and the SSRIs

One of the most significant ranges of drugs ever produced is the benzodiazepine tranquillisers (usually classed as ‘minor tranquillisers’ or ‘hypnotics’), often prescribed as a remedy for ‘minor’ disorders such as depression, sleeplessness and anxiety. In effect, they extended the range of conditions that could be treated by medication. The best-known example is probably Valium.

2.1 Introduction

During his interview, Daniels expressed the opinion that Vygotsky's theory is attractive because it:

Promotes the view that effective parenting, instruction and education lead development. Preparing, or socialising, children for the future, therefore, becomes a highly meaningful (and often politically charged) activity, as does deciding which types of experiences will best foster the acquisition of skills and co
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1.6.4 D. Worker as community developer

Young people are a fully contributing part of their communities already and their views and interests need to be taken as seriously as those of any other grouping. It's the adults’ role to help articulate their needs and concerns and to give them information and support to help them communicate these appropriately in the right quarters. Adults may need to act as advocates with or on behalf of young people to ensure their voice is heard. Young people also have responsibilities in relation to
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Computer Basics : What Is a Network Hub?
A network hub is used to connect computers together so that they can communicate with each other over the same cable. Set up a network hub by plugging in network cables from different computers using help from a certified computer technician in this video on computer networks. (01:20)

Expert: Jonathan Ayres
Bio: Jonathan Ayres has more than 25 years of computer industry experience with all types of computer hardware and operating systems.
Filmmaker: Todd Green

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7.1 Introduction

So far we have presented two pieces of evidence pointing to the occurrence of a big bang: the redshift of the galaxies (indicating the continuing expansion of the Universe), and the 3 K radiation (the remnant of the primordial radiation). But there is a third imprint such a big bang ought to have left on our present-day world. We cannot at this juncture trace out the full sequence of events following the instant of the big bang (that can only be done after we have worked through the next two
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DRS2 Public Search, Object Delivery, and API | Library Lab
Helps users tap into the extensive resources found in DRS2, Harvard Library's digital preservation and access repository.
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Web We Want : Handleiding voor jongeren en leerkrachten
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Voor vele jongeren in het begin van deze 21e eeuw zijn persoonlijkheid, sociale interactie en activiteiten online even belangrijk als hun leven in de echte, fysieke wereld. Leerkrachten moeten zich hiervan bewust zijn en jongeren helpen om …


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"This video is part of the Holocaust Education Video Toolbox. For more videos and teaching aids, visit: http://www.yadvashem.org/VideoToolbox. In the video, "Holocaust Survivors - Liberated but Not Free", ISHS staff member Sheryl Ochayon presents the story of the survivors, from the moment of liberation to their experiences searching for family members and loved ones. Ms. Ochayon discusses the magnitude and complexity of liberation as a bittersweet moment for most survivors, their attempts ret
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