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journal of
science education
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Current Issue
June 2001
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Honeybees use a
Speedometer to Navigate Successfully
Moushumi Sen Sarma
We move around, find our bearings in an unfamiliar place, quickly learn
the way home, or school, without even being aware of the processes which enable us to do
so. The skills required to navigate in a complex world like ours is not easy: We must be
able to have a measure of distance and direction, recognize landmarks and use a host of
other cues to successfully find our way around. Every animal that moves around, needs to
be able to navigate successfully and thus needs similar skills. To appreciate how
important it is to navigate successfully, consider an animal that leaves behind the
helpless young in a nest and must come back with food: the cost of making mistakes could
be extremely high.
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Address for Correspondence
Moushumi Sen Sarma,
Centre for Ecological Sciences,
Indian Institute of Science,
Bangalore 560012, India.
Email: moushumi@ces.iisc.ernet.in |
| Learning from a Sea Snail: Eric
Kandel
Rohini Balakrishnan
In the year 2000, Eric Kandel shared the Nobel Prize in Physiology and
Medicine1 with two other neurobiologists: Arvid Carlsson and Paul Greengard. Whereas
Carlsson and Greengard were awarded for their work on dopamine, an important
neurotransmitter in the brain, changes in the level of which result in Parkinsons
disease, Eric Kandel was honoured for his extensive and invaluable contribution to our
understanding of the cellular and molecular mechanisms of learning and memory. of
the term was extended to include a class of structurally unrelated proteins which mediate
correct folding of other proteins but do not themselves form a part of the final
structure. In a broader sense, they help determine the fate of a protein in the cell. Not
only do they ensure correct folding, but also the correct assembly of the units of an
oligomeric protein and transport of a protein to its particular subcellular compartment.
During heat stress they assume the responsibility of quality control. They bind the heat
denatured proteins and catalyze their renaturation.
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(26 Kb)
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| Address for Correspondence
Rohini Balakrishnan,
Centre for Ecological Sciences,
Indian Institute of Science,
Bangalore 560012, India. |
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