Assume that your microscope is equipped with 10X eyepieces and 4X, 10X, 40X obje
ID: 197898 • Letter: A
Question
Assume that your microscope is equipped with 10X eyepieces and 4X, 10X, 40X objective lenses. Suppose you are given a slide of a stained Chlamydomonas a unicellular protist with two flagella. Your plan is to mount the slide in your microscope, locate the cells, and determine the flagella length for 10 specimens within 10 minutes. Your eyepiece is calibrated so that each division covers 1.25 micrometers at 400X magnification. You found 10 Chlamydomonas cells with flagella that average 23 divisions long at 400X. What will you report for the average length of flagella among the cells in your culture?
Explanation / Answer
Answer:
Information give in the question:
1. each division cover 1.25 micrometer at 400X magnification i.e. 1250 microns.
2. 10 Chlamydomonas cells with flagella of 23 divisions long at 400X.
As 10 Chlamydomonas cells cover 23 divisions i.e. each cells covers 2.3 divisions.
The length is directly calculated as 2.3 divisions time 1250 microns, which come out to 2875 micron.
Hence the average length od flagella among cells is 2.875 micrometer.