Blue Test Lab Report

Blue test

The question marked wrong was number 19. If electrons are shared unequally, then there is an uneven distribution of charge, which makes the molecule polar.

2) Fatty acids are made of a hydrocarbon tail and a polar carboxylic acid head. The carboxylic acid group has a charge of -1, therefore the molecule is negatively charged (which eliminates answers a, b, and e). For the fatty acid to become neutral, it has to be found in a low pH environment:

Low pH – acidic, more H+  the positively charged H atoms will counteract the negatively charged carboxylic acid heads creating a more neutral environment

High pH – basic, more OH-  negatively charged OH will not make a negatively charged fatty acid neutral

Therefore, answer d is correct.

Phosphorylation is the addition of a phosphate group to a molecule. In the schematic diagram one can notice that the phosphorylated Z regulates the activity of protein X, therefore it must be ACTIVATED by phosphorylation (which eliminates answers b and d). The phosphorylated Z protein catalyzes the production of the X protein from the PX protein, which means it favors the removal of a phosphate group making it a phosphatase.

Therefore, answer C is correct.

21) General formula for an amino acid includes: an amino group, a hydrogen, a carboxyl group and a side chain

a) A methyl group can only be found in threonine, alanine, valine, leucine, isoleucine,