Which of the following amino acids is a non-polar amino acid?

In 1828, Friedrich Wohler synthesized urea from ammonium and cyanate ions to demonstrate that organic molecules can be synthesized outside of an organism.  However, the scientific community was still skeptical about this view of mechanism over vitalism.  What was the main reason behind their skepticism about the results of his experiment?

Which of the following statements is FALSE about the glucose molecule?  

In sickle cell anemia, there is a mutation in the beta subunit of hemoglobin where a glutamic acid is replaced with valine.  How would that change affect the molecule?

This is a virtual scrap paper.  Nothing written in this space will count towards points.

Most common form of regulation in living organisms is ___(1)___.  In ___(2)___, the end product speeds up its own production.

Ethane represented in the following form is an example of __________________.     

Which of the following is named correctly? I. Fe(NO3)2 = Iron (III) nitrate II. Li2S = lithium sulfide III. CF4 = carbon tetrafluoride IV. ZnO = Zn (I) oxide

Consider the data sets for the three groups below who were trying to calculate the molar mass of Fe in a laboratory experiment. Determine which group was most accurate and which group was most precise. Trial Group 1 g Fe (g/mol) Group 2 g Fe (g/mol) Group 3 g Fe (g/mol) 1 55.80 55.75 55.75 2 55.90 55.40 55.70 3 55.82 55.90 55.74 Average 55.84 55.68 55.73 Standard Deviation 0.05 0.3 0.03

In 2019, Nai-Yu had the following transactions:  Salary $90,000  Short-term capital gain from a stock investment 4,000  Moving expense to change jobs (11,000) Receipt of repayment of $20,000 loan she made to her sister in 2014 (includes no interest) 20,000  State income taxes (5,000) ​ Nai-Yu’s AGI is:   a.  $114,000.   b.  $103,000.   c.  $98,000.   d.  $94,000.   e.  $83,000.