{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Answers_to_protein_study_guide

Answers_to_protein_study_guide - Answers to study guide...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Answers to study guide 3 (Kopachik) 1. Why are protein polymers so versatile in numbers of proteins and in ability to interact with other molecules in the cell and so cause physiological changes to occur? Proteins can be made to be different in the number of amino acids and the sequence of amino acids. Because there are 20 choices for amino acids at each monomer addition site there is a fantastic number of possibilities. For instance 20 360 is the number of variations of an average sized protein. This very high number of sequences for polypeptides means that a fantastically large number of different shapes and surfaces are possible for these macromolecules. The proteins in cells are a selected set of these that have very specific roles to play in interacting with other molecules in the cell. 2. Draw a generic amino acid and describe the main functional groups? Use the terms alpha carbon, amino group, carboxylic acid group, R group. H | NH 2 - C - COOH | R Amino group ionized to NH 3 + and carboxyl group ionized to COO - at pH 7. R side group is any one of just 20 possible groups: they play roles in determining the shape and therefore function of the protein. R groups can be uncharged, acidic, basic or hydrophilic or hydrophobic. Classification of the R groups: 1. hydrophilic: with hydroxyl, sulfhydryl, carboxylic groups generally on the outside of proteins. 2. hydrophobic: with nonpolar R groups internal location. - the R groups determine solubility, shape, and therefore function 3. From Fig. 5.17 be able to recognize amino acids that would be nonpolar, polar or electrically charged.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern