At the end of this experiment two layers are formed in the tube. Where will the DNA be?

A) In the aqueous mixture at the bottom of the tube.
B) At the interface between the two layers.
C) In the alcohol layer at the top of the tube.


B) At the interface between the two layers.

Biology & Microbiology

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a. 6% b. 16% c. 46% d. 60% e. 96%

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Atoms in which the number of electrons does not equal the number of protons are known as:

A. valences. B. isomers. C. isotopes. D. ions.

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Which of the following would demonstrate a point mutation to the following DNA sequence: CAT GAT ATC? 

A. GUACUAUAG B. AUGCUAUAG C. CATCATATC D. GUAAUCAUG

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Which group(s) of plants requires water in order for the sperm cell to swim to the egg?

a) seed plants b) only ferns c) only mosses d) both mosses and ferns e) all plants

Biology & Microbiology