Winter2008exam1

Winter2008exam1 - BIO 234 - Elementary Microbiology -...

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BIO 234 - Elementary Microbiology - Sample Exam 1, Summer 2008 Correct answers given at end of exam. MULTIPLE CHOICE. Choose the one answer that best completes the statement or answers the question. 1. Which of the following pairs is mismatched? a. van Leeuwenhoek - first to observe microbes b. Lister - used disinfectant to prevent surgical infections c. Jenner - demonstrated that cowpox (vaccinia) inoculation protected against smallpox d. Pasteur – gooseneck flask experiments disproved spontaneous generation e. None of the above are mismatched 2. From the information given below, what is the molecular weight of deoxyribose, C 5 H 10 O 4 ? Element Symbol No. Protons No. Neutrons Hydrogen H 1 0 Oxygen O 8 8 Phosphorous P 15 16 Carbon C 6 6 a. 62 b. 29 c. 134 d. 72 e. None of the above 3. You observe a cell through a microscope and see that it has chloroplasts. To which Domain of organisms does it belong? a. Archaea b. Eukarya c. Bacteria d. Protista e. Cannot be determined from the information provided 4. Which of the following is NOT true of ionic bonds? a. Electrons are shared by atoms b. They are stronger than hydrogen bonds c. They are weaker than covalent bonds d. They are involved in forming the tertiary structure of proteins e. None of the above (all of the above are true of ionic bonds) 5. Which of the following statements is NOT true of biological organic molecules? a. Always contain hydrogen and carbon b. Monomers are linked together by hydrolysis (“water splitting”) c. Their atoms are mostly or entirely covalently bonded d. Usually polymers formed from subunits (monomers) e. None of the above (i.e., all of the above are true) 6. Which of the following statements is NOT true? a. The minimum energy that can produce a chemical reaction is the activation energy b. Decomposition (degradation, catabolic) reactions are usually exergonic c. Synthesis (anabolic) reactions are usually endergonic d. Enzymes accelerate reactions by raising (increasing) the activation energy e. None of the above (i.e., all of the above are true) 7. The secondary structure of a polypeptide (or protein) molecule is best described as: a. Two or more polypeptide chains b. Sequence of amino acids c. Coil (helix) or pleated sheet arrangement d. Overall 3-dimensional structure e. None of the above 8. If a bacterial cell is placed in a hypertonic (hyperosmotic) solution: a. Water moves through the plasma membrane out of the cell b. Water moves through the plasma membrane into the cell c. There is no net movement of water either into or out of the cell d. The cell undergoes osmotic lysis e. b and d
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9. All of the following are correctly matched for bacteria except : a. Flagella – rotate to cause “tumble and run” motility b. Cell wall - mainly composed of peptidoglycan c. Ribosomes - site of mRNA translation d. Endospores - highly resistant structures for survival in adverse conditions e. None of the above (all are correctly matched) 10. Which of the following is NOT true about the plasma (cytoplasmic) membrane? a.
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This note was uploaded on 07/03/2008 for the course BI 234 taught by Professor Skeels during the Winter '07 term at Portland State.

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Winter2008exam1 - BIO 234 - Elementary Microbiology -...

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