Study Guide 1 Answers

Study Guide 1 Answers - _hydrophilic(or polar but not for...

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Answers to BS 111 Study Guide 1 (Kopachik) Lecture 1 and Chapter 3 questions . Fill in the blank space to make a true statement. The basic biochemical pathways of metabolism are the same in _ prokaryotic and eukaryotic cells. Even the enantiomers of amino acids are all left-handed. Pathways for anabolism (biosynthesis) and catabolism have been found to be similar in bacterial and human cells. Polymers of nucleic acids are used for genetic information in all organisms and viruses. The outer _ valence electrons are responsible for the chemical properties of an element. Radioisotopes are used to detect and trace biological molecules. The strongest bonds between elements are double covalent bonds . A protein polymer is held together by peptide bonds, a type of _ covalent bond between the amino acids, Van der Waals forces in the hydrophobic areas, _ H bonds extending from O and N atoms, and strongly electrostatic ionic bonds. Water is a good solvent for
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Unformatted text preview: _hydrophilic (or polar) but not for _ hydrophobic (nonpolar) molecules. The high number of _ H bonds within a macromolecule and between it and the hydration shell makes them very important for maintaining the shape of the molecule. The shape of a macromolecule is most important for its _ function . Placing in pure water a molecule with an acidic –COOH functional group would _decrease the pH of the solution. Biological _ buffers of which carbonic acid is one example are used to maintain the organism’s pH. To make 100 ml of an aqueous solution containing 0.5 M glucose which is C 6 H 12 O 6 (with atomic mass of C=12, H=1, O=16) and having a molecular weight of _ 180 _you would dissolve ___ 9 ___ grams of glucose in a total volume of 100 ml. A solution of pH 7.4 is _ 2.5 _ times more basic than a solution of pH 7.0. The H + ion concentration at pH 7.0 is _ 10-7 whereas at pH 7.4 it is _ 4 X 10-8 M ....
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