A chicken has 78 chromosomes. A chicken cell will contain _____ chromosomes at the beginning of prophase and
_____ chromosomes after mitotic division is complete.
a. 78; 39
b. 78; 78
c. 39; 78
d. 156; 78
e. 78; 156
ANSWER: d
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How could the Hershey and Chase experimental procedure be re-designed to support the hypothesis that RNA rather than DNA was the transforming agent?
A. Extract RNA from Escherichia and mix it with the T2 bacteriophage. B. Use 35S and 32P to label the same components of an RNA virus and T2 bacteriophage, then add both viruses to Escherichia cells. C. Use 35S to label an RNA virus and 32P to label a DNA virus. D. Replace Escherichia with an RNA virus. E. Replace T2 bacteriophage with an RNA virus.
A(n) _____disease is an infectious disease that does not arise from host to host transmission
Fill in the blank(s) with the appropriate word(s).
In a mixture of gases, the driving force for the movement of an individual gas within that mixture is ultimately the
A) total pressure of the gases. B) volume of the gas. C) partial pressure of that gas. D) fractional concentration of that gas. E) solubility of the gas.
Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. How would the balloon be affected if it is filled with a 50% sucrose solution and then placed in a beaker of water?
A) The balloon would not change in size or volume. B) The balloon would get smaller as it loses water. C) The balloon would get larger as it gains water. D) The balloon would eventually burst.