BIOCHEM Unit 1 Complete solutions 2024

BIOCHEM Unit 1 Complete solutions What is the maximum number of hydrogen bonds that water may form? - Answer -4 The strongest hydrogen bonds have angles of ___ - Answer -180 degrees The spontaneous clustering of lipids is driven by an energetically favorable increase in the ___ of water. - Answer -Entropy Phosphoric acid has a pKa of 2.1 At what pH will 75% of phosphoric acid be in the conjugate base form? - Answer -2.6 All of the amino acids are chiral except: - Answer -Glycine Which amino acids are negatively charged at neutral pH? - Answer -Glutamate, aspartate Which of the following statements regarding amino acid chemistry is INCORRECT? - Answer -At pH 7, glycine will have an overall charge of +1 ****CORRECT: the pKa values of most carboxylic acid groups are above 2. At pH 7, the majority of the carboxylic acid groups will have a negative charge. The pKa values of most amino groups are above 9. At pH 7, the majority of the amino groups will have a +1 charge. How many ionizable groups are in the following peptide? Leu-Val-Asp-Try-Lys - Answer -4 Which of the following techniques separates proteins based on size? - Answer -Gel filtration chromatography Which of the following is generally used for protein analysis, but not protein purification? - Answer -SDSPAGE Which of the following amino acids absorbs UV light? - Answer -Tryptophan Which of the following techniques is used to sequence