*XIII-1 C NC **XIV-1 C NC ***XIV-2 C NC XV-1 C NC XVI-1 C NC XVI-2 C NC. Chemistry 130 Quiz 8 Fall 2010

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1 *XIII-1 N **XIV-1 N ***XIV-2 N XV-1 N XVI-1 N XVI-2 N hemistry 130 Quiz 8 Fall 2010 Name: Key I. (1 pt) For each key type of biochemical molecule, give the letters of the functional groups that are characteristic of that type of molecule. There may be more than one type of group per molecule, and letters can be used more than once. D, F 1. carbohydrates 2. saponifiable lipids A,, E 3. proteins A. amides D. alcohols. esters E. ammonium ions. carboxylate ions F. acetals II. (0.5 pt) Which type of biomolecule listed above is least soluble in water? Enter your answer in the space below: Saponifiable Lipids III. (1 pt) Polymeric materials are important in biochemistry. A. Amino acids are the building blocks for one of the types of biochemical molecules listed in Question I above. Which is it? Write your answer in the space below. Proteins. Which class of biochemical molecules includes the polymers starch, glycogen, and cellulose? arbohydrates. Which class of biochemical polymers are built up from monosaccharides? arbohydrates

2 IV. (1 pt) Stereoisomerism is important in biochemistry. A. Give the letters of all the compounds below that could have enantiomers., D, E. Give the letter of the compound that could have diastereomers. E 3 3 A Ethylene glycol Propylene glycol Toluene D Limonene E Deoxyribose *V. (0.5 pt) Give the letter of the correct classification for the carbohydrate below. A. ketopentose. ketohexose. aldopentose D. aldotetrose

3 V. (1 pt) In the structure shown below, select the letter of the designated region which is: A a primary alcohol D a hemiacetal a secondary alcohol an acetal 2 A 2 D **VI. Examine the structure below, then choose the correct response for each question. Write the letter of the correct response in the space. At least two of the responses must be correct to complete the competency The compound is: A. a wax. a fatty acid. a triglyceride D. a steroid 2. It would be found in: A or D A. animals. plants. fungi D. all of the above 3. It functions as: A. a hormone. an enzyme. a component of a triglyceride D. all of the above VII. Which functional group is typical of fatty acids that are found in plants? Select your choice from the list below and write the word in the space provided. A. Ketones. Amides. Alkenes (double bonds) D. Aldehydes E. enzene rings F. Amines Alkenes

4 ***VIII. Identify each structure below by putting the letter in the space to the left of the correct term. At least two of the responses must be correct to complete the competency. 3 ( 2 ) 12 N A P ( 2 ) 7 ( 2 ) N 3 3 R 2 P R 1 2 R 4 N R 1 R 2 R 3 3 ( 2 ) 12 2 N ( 2 ) 7 ( 2 ) 7 3 D A a sphingomyelin a phosphoglyceride a triglyceride A a glycolipid

5 IX. From the list below, select the items that describe functions of proteins. ircle the letter of correct responses. You must have at least four correct responses, and no more than two incorrect responses, to complete the competency. A. Energy storage: Proteins are the main molecules used by the body as energy reserves.. Nerve Impulse Transmission: Proteins act as receptors of molecules in nerve synapses.. atalytic: Proteins called enzymes increase rates of reactions. D. Movement: Proteins in muscles control contraction. E. ell replication: Proteins encode genetic information. F. Transport: Proteins carry small molecules or ions through the body. G. Structural: Proteins provide mechanical strength in muscle and bone.. Regulatory: Proteins called hormones regulate physiological processes. I. Protection: Proteins called antibodies combat viruses and bacteria. J. arriers: Proteins are the main component of cell membranes. K. Storage: Proteins store amino acids as nutrients. L. Fluid/solvent: Proteins are the main liquid in the body. X. True/False. Enter a "T" to the left of a sentence if it is true; "F" if it is false. T T F F T Proteins exist as "zwitterions" rather than as neutral molecules. Nine amino acids are "essential" and cannot be synthesized by the body. The primary structure of a protein is the loops and coils of the amino acid chain. A protein is said to be denatured when it is hydrolyzed to amino acids. The linkage between amino acids in proteins is an amide, also called a peptide.

6 XI. Match the name of the enzyme with that of its preferred substrate. You must get at least two of the responses correct to demonstrate competency. 1. lipase A. urea D 2. sucrase. pyruvate 3. pyruvate kinase. lipids A 4. urease D. sucrose XII. From the list of words below, choose the one that correctly completes each statement about enzymes. Enter the letter associated with the word in the space to the left of the sentence. A. prosthetic group. specificity. coenzyme D. competitive E. catalyst F. irreversible G. EIU. cofactors I. vitamins J. turnover rate K. regulator L. efficiency E An enzyme is a(n) in a biochemical reaction; it increases the rate of the reaction. The property of an enzyme which states that it affects a single type of reaction for a particular compound is. A A(n) is a tightly-bound non-peptide component of an enzyme. oenzymes are sometimes called. D In inhibition of an enzyme, the inhibitor blocks the active site of the enzyme. J The indicates the number of substrate molecules that an individual enzyme molecule can react with in a minute.