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Which of the following regulatory elements is NOT a sequence of DNA?

Which amino acid would be attached to the tRNA molecule shown below?

A researcher is studying the effects of increasing the amount of acetylation of histone tails in a culture of human cells. Which of the following results would she most likely see?

Calculate the average atomic weight from the following natural abundance data:    Atomic Symbol     Atomic Mass (amu)     Percent Abundance (%)     Report your answer in amu, to 2 decimal places. 

If the amount of O2 given in question 1 reacts with your given amount of Na in question 2, which is the limiting reactant AND what is the maximum amount (in grams) of Na2O that can be produced? Why?    *You can also use this space to explain how you did question 1 and 2 for partial credit. 

Required- Explain how you did the problem above. Be sure to either show all of your math or explain each conversion step you did in words.   

Quiero que María____________ la tarea.

Which of the following mixtures would be a buffer solution? Select ALL that apply.

Convert [x]oF to K. *report your answer numerically in K, you must convert to oC before converting to K. 

Describe what you did to complete the former question if you’d like to potentially receive partial credit.