Chemistry 102 Lab Spring 2016 Name Read and answer all questions carefullyl Be s

Question

Chemistry 102 Lab Spring 2016 Name Read and answer all questions carefullyl Be sure to answer all parts of a question. Full credit cannot be given if part of the answer is missing. For multiple choice questions, choose the best answer. Show all work for calculations includins set-up and units! If you are unclear about a question, ask for clarification from the TA or the professor. Quiz#12: AminoAcidsandProteins 1. Which of the following is NOT part of an amino acid? a. amino group b. carboxylic acid group c. aldehyde group d. variable group 2. TRUE or FALSE: A peptide bond is formed as a result of a condensation reaction. 3. Hydrophilic/Hydrophobic (circle one) amino acids tend to be on the protein surface while hydrophilic/hydrophobic (circle one) amino acids tend to be buried in the center of a protein. 4. At the isoelectric point a. a protein has a net charge of zero. b. a protein is most soluble. c. a protein has many dipole-dipole interactions d. a protein is completely folded 5. What important feature of a protein determines its biochemical function?

Explanation / Answer

1) aldehyde group is not a part of amino acid

2) True.water is released during the formation of peptide bond.

3) Hydrophilic amino acids tends to be in the protein surface while hydrophobic amino acids tend to be buried in the centre of the acid .

4) At isoelectric point , the net charge on the acid is zero.

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