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10 Cards in this Set
- Front
- Back
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What is the function of a ribosome? |
The function of a ribosome is in protein synthesis. |
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A type of white blood cell called a macrophage measures 5 x 10-5 m. What does it measure in micrometres? |
A macrophage measures 50 μm. One micrometre equals 10-6 m, so a macrophage measuring 5 x 10-5 m would be fifty times this. |
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If the actual size of a cell is 100 μm, and 10 cm in a book, what is the magnification of the image in the book? |
The magnification of the book image is 1000 times the actual size. The calculation is 100 000 μm ÷ 100 μm = 1000. |
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How have microscopes developed over the years? |
Increased magnification, increased resolution |
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If a cell called a megakaryocyte measures 1 x 10-4 m, and a neutrophil measures 1 x 10-5 m, what is the difference in order of magnitude? |
1 |
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Which of the following is an advantage of the transmission electron microscope compared with the light microscope? |
Higher magnifications are possible with the transmission electron microscope |
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Which of the following is the correct sequence for setting up a microscope on high power? |
Focus on low power with the coarse adjustment, move the high power objective in line with the specimen, refocus on high power with the fine adjustment |
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Which of the following is an adaptation to the transport of substances in the xylem? |
There are no end walls, and the side walls are thickened |
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How is a muscle adapted to its function |
It contains protein filaments that slide over each other and cause contraction |
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Which of the following is a feature of eukaryotic cells not present in prokaryotic cells? |
Mitochondria |
