Question 1200864
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DNA molecules include the base units adenine, thymine, cytosine, and guanine (A, T, C, and G). 
The sequence of base units along a strand of DNA encodes genetic information. 
In how many different sequences can A, T, C, and G be arranged along a short strand of DNA that has only 8 base units?
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<pre>
In  {{{4^8}}} = 65536 different ways.    <U>ANSWER</U>


Any of 4 base units can be in the 1-st position.

Any of 4 base units can be in the 2-nd position, independently.

Any of 4 base units can be in the 3-rd position, independently.


   . . . and so on, if there are no other restrictions . . . 


It gives the answer above.
</pre>

Solved.


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