9. Use the terms below to fill in the blanks; some of the terms shall remain unu

Question

9. Use the terms below to fill in the blanks; some of the terms shall remain unused. Communication between eukaryotic cells in a higher organism is exerted through molecules called behave as called , which Communication inside the cell is called and therefore its amino acids hormones secondary messengers metabolism nucleic acids primary messengers enzymes gene expression signal transduction 10. Assume that in humans the distance between two light perceiving cells is 150 m on the average (do not factor in whether they are rods or cones). What is the minimum distance at which you would perceive two very small objects as separate (resolution) with the naked eye? Hint: A second assumption is that your glasses give you enough visual acuity A) No less than 2 cm apart B) About 200 um apart C) No less than 2 mm apart D) As low as 2 m apart E) None of above 2 11. The ciliate Didinium sp. feeds on other organisms by engulfing. Why are bacteria, in general, unable to feed on other cells in this way?

Explanation / Answer

9. Communication between eukaryotic cells in a higher organism is exerted through molecules called secondary messengers which behave as hormones. Communication inside a cell is called transduction and therefore its components are called nucleic acids primary messengers.

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