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QUESTION-TYPE BASED TESTS
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G. If cells are placed on a microscope slide, they flatten under gravity. When cells are surrounded by
other cells, proteins called integrins attach one cell to another at specific locations. These act as tensegrity
wires, pulling the cells taut in all directions. When the integrin network is disrupted, the cells sag. Whether
or not the cell is a tensegrity structure is still controversial, but in a series of recent papers, lngber and his
team have been gradually picking off the objections with detailed studies of cell structure. For the lay
observer, pictures of a cell showing triangular structures resembling a geodesic dome are highly suggestive
of tensegrity.
H. It has been a long road since Black Mountain College in 1948, but it all comes back to Kenneth
Snelson and his sculpture. Once asked what he would save from a fire in his office, Donald Ingber replied:
`The tensegrity model made by Kenneth Snelson, a gift from the artist himself.
Questions 1-4
Answer the questions below using NO MORE THAN THREE WORDS from the passage for each answer.
Q1. Who first used the word ‘tensegrity’?
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Q2. Which parts of the tensegrity model prevent the straws losing their shape?
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Q3. Which parts of a cell hold its microtubules in place?
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Q4. What substances join cells to each other?
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