PRACTICE QUIZ ON ORGANIC/BIOCHEMISTRY

Instructions: You may prefer to print out the quiz and mark it.  After you have finished marking the quiz, you can grade each question by clicking on a quiz answer.  When you click on a quiz answer, you will be given feedback indicating whether your answer is correct.  When you get a feedback response, click on the back arrow to return to the quiz. After scoring your quiz, you should have an idea if you need to study the material more.  Remember to post questions about things you don't understand in the Class Forum.

1.  The bonds in organic molecules are usually _____ bonds because carbon atoms tend to ________electrons.

        a.  ionic; share        b.   ionic; transfer         c.  covalent; share         d.  covalent; transfer

2.  Which of the following molecules is smallest?

        a.   sucrose        b.  glucose         c.  glycogen         d.  starch

3.  Which of the following elements is not required in order for the compound to be considered organic?

        a.  carbon         b.  oxygen        c.  hydrogen         d.  all must be present

4.  Which of the following information is given by a structural formula but not by a molecular formula?

    a.  atom types     b.  number of atoms of each type    c.   bonding pattern in the molecule

5.  The monomer type that is characteristic of carbohydrates is ________ and the monomer type that is characteristic of proteins is________.

6.  Which of the following elements is usually found in proteins but not in triglycerides?

   a.  calcium     b.  phosphorus    c.  nitrogen     d.  oxygen

7.  Structurally lipids are a very diverse group but they are all placed in one group because of what property?
    a. They are composed of glycerol and fatty acids.
    b.  They are all soluble in water.
    c.  They all contain four interlocking rings.
    d.  They all are important as energy storage molecules.
    e.  None of the answers is correct.

8.  The macromolecules that contain hereditary information and are found in chromosomes are
    a.  proteins    b.   triglycerides    c.  nucleic acids    d.   polysaccharides

9.    In the digestive process, the macromolecules are broken down into small molecules that can cross cell                    membranes.   This process is called
    a.  hydrolysis    b.   dehydration synthesis    c.  cellular respiration     d.  protein synthesis

10.  The functional group(s) associated with amino acids is/are
    a.  hydroxyl    b.   carbonyl    c.  phosphate    d.  amino     e.  carboxyl    f.  both amino and carboxyl

11.   The following equation (G stands for glucose) G + G + G ---------> G-G-G  +  2H2O, is an example of
    a.  ionic bond formation     b.  peptide bond formation    c.  dehydration synthesis    d.  hydrolysis 

12.    Denaturation of a protein involves a change in the _________ structure of the molecule.
    a.  primary         b.  secondary         c.  peptide bond         d.  a, b, and c are all involved in denaturation

BIOWEB  Al BIO 101 Web Section  ELI BIO 101 Web Section 
nverdae@nvcc.edu
Emma Erdahl, Associate Professor of Biology
Northern Virginia Community College
Revised 8/23/00