You discover an organism that has a nucleus but no mitochondria. This organism could be a
a. euglenoid.
b. diplomonad.
c. kinetoplastid.
d. ciliate.
e. dinoflagellate.
B
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A laboratory assistant that works with mice recently noticed that their lymph nodes were swollen and that they had a lesion on their hand that was not there a few weeks ago. The lymph node tis-sue is sent to the laboratory for culture. The laboratory technologist noticed on the stained sample that there was an organism present that resembled a spiral, gram negative with flagella. The cultures
grew no organisms. What is the most likely cause for the discrepancy? a. The laboratory technologist misidentified the stain artifact as an organism. b. The laboratory technologist did not culture the sample to media. c. The organism is not able to grow on media and requires another method for iden-tification. d. The organism was not allowed to incubate long enough.
Whether a cell lives or dies after a particular event depends to a large degree on ________ between ________ and _________ signals.
a) the balance, mitotic, cytokinetic b) the balance, proapoptotic, antiapoptotic c) the differences, on, off d) the differences, mitotic, cytokinetic e) the similarities, proapoptotic, antiapoptotic
Given what you know about normal sex determination in humans, which of the following statements is CORRECT?
a) An "XXY" individual would have a diploid number of 48 since they would have 2 X chromosomes. b) A "YY" male would be sterile. c) "XXXX" individuals would have 3 Barr bodies in their somatic cells. d) "XO" individuals are said to have Klinefelter Syndrome.
The Gram-staining procedure is an example of ________.
A. simple staining B. fluorescent staining C. differential staining D. negative staining