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Sites that might prove useful to a homeschool student or teacher for life science in the middle grades.
Updated on Mar 09, 09
Created on Feb 23, 09
Category: Science
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Bob Brussack's List: Life Science
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Feb 23, 09
Researchers have found a way to expose a virus spike’s neck, which apparently does not mutate, and picked antibodies that clamped onto it. Once its neck is clamped, a spike can still penetrate a human cell, but it cannot unfold to inject the genetic instructions that take over the cell’s machinery to make more virus.
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The flu virus uses the lollipop-shaped hemagglutinin spike to invade nose and lung cells. There are 16 known types of spikes, H1 through H16.
The spike’s tip mutates constantly, which is why flu shots have to be reformulated each year. But the team found a way to expose the spike’s neck, which apparently does not mutate, and picked antibodies that clamped onto it. Once its neck is clamped, a spike can still penetrate a human cell, but it cannot unfold to inject the genetic instructions that take over the cell’s machinery to make more virus.
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Mar 01, 09
Life Science. Human Body. Nervous system. Excellent overview of the neuron. Includes cool interactive features.
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Mar 09, 09
A very simple interactive illustration of the amino acid glycine. Should be helpful as an adjunct to other resources, but is not itself an adequate introduction to amino acids.
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- Multiple narrators, using clear language and helpful visuals, offer a basic discussion of amino acids. The presentation assumes an understanding of molecular models and elementary chemistry. It is too advanced for most elementary students and too rudimentary for advanced high school or college courses. It should be helpful to many middle-school and high-school students. - Bob Brussack on 2009-03-09
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