The number of cells in the different phases of a population can be determined most easily by using a(n) _______ to measure the amount of DNA per cell in a large sample of cells.
a. scintillation counter
b. flow cytometer
c. fluorescence microscope
d. phase-contrast microscope after autoradiography
Ans: b. flow cytometer
Biology & Microbiology
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Tay-Sachs disease affects in 1 in 3,600 Ashkenazim births. The value of q2 is
A) 0.1. B) 0.05. C) 0.017. D) 0.0003.
Biology & Microbiology
Which gland could be called the “master gland” because of the extent of its effects on the body?
1.pineal 2.pituitary 3.thyroid 4.adrenal 5.pancreas
Biology & Microbiology
About __________ of the genes in a mouse have a similar gene in humans
a. 10%. b. 25% c. 50% d. 90% e. 99%
Biology & Microbiology
The epiglottis forms a lid over the larynx when we swallow food: it closes off the respiratory passageway to incoming food or drink.
Answer the following statement(s) true (T) or false (F)
Biology & Microbiology