Microbiology Test 1 Quizzes PDF

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The answers to the questions on the first quiz for General Microbiology BIOL 3401....

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Chapter 1 Quiz 1. Which of the following is a unique characteristic of viruses that distinguishes them from other major groups of microorganisms? -Lack cell structure 2. Into which group would you place a photosynthetic cell that lacks a nucleus? -Bacteria 3. The formal system for classifying and naming organisms was developed by Carolus Linnaeus 4. Into which group would you place a unicellular organism that has 70s ribosomes and a peptidoglycan cell wall? -Bacteria 5. 1.

9+2 flagella

2.

Nucleus

3.

Plasma membrane

4.

Peptidoglycan

5.

Mitochondrion

6.

Fimbriae

In the table, which features is are found only in prokaryotes? -4,6 6. Microorganisms are involved in the following processes EXCEPT? - Smog production 7. Which of the following characterizes the Domain Bacteria? -Prokaryotic cells; ester linkages in phospholipids 8. Consider organisms that are eukaryotic, are found in both unicellular and multicellular forms, may resemble plants but are not photosynthetic, have chitin in their cell walls, and absorb organic nutrients from decomposing material in the environment. These organisms would be classified as which of the following types of organisms? -Fungi 9. Into which group would you place a multicellular heterotroph with chitin cell walls?

-Fungi 10. A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on -Determining evolutionary relatedness 11. Each of the following organisms would be considered a microbe EXCEPT -mushroom 12. Spontaneous generation refers to living cells arising only from other living cells

- False 13. Disease causing microorganisms are called -pathogens 14. In the figure, species "c." is most closely related to which of the following?

d. 15. The study of evolutionary relationships among organisms is called -Phylogeny Chapter 2 Quiz 1. What is the type of bond holding hydrogen and oxygen atoms together in a single H2O molecule? -Covalent bond 2. What are the primary molecules making up the plasma membrane in cells? -Lipids 3. Which of the following statements regarding protein structure is FALSE? -Tertiary structures are formed only from covalent bonds. 4. What do genes consist of? -Nucleic acids 5. Which of the following is the type of bond holding K+ and I- ions in KI? -Ionic bond 6. All chemical reactions are, in theory, reversible. -True 7. What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule, where the two don't actively share an electron? -Hydrogen bond 8. Identify the following reaction: Glucose + Fructose → Sucrose + Water - Dehydration synthesis reaction 9. Identify the following reaction: Lactose + H2O → Glucose + Galactose -Hydrolysis 10. Which type of molecule NEVER contains a phosphate group? -Triglycerides 11. Starch, dextran, glycogen, and cellulose are polymers of -Glucose 12. Which of the following statements is true regarding organic molecules?

-Carbohydrates are a large and diverse group of molecules composed of carbon, hydrogen, and oxygen. Examples include glycogen and starch. 13. Protein structure is directly related to the function of the protein. Which of the following is an accurate description of the level of structure in a protein? -Tertiary protein structure is the overall three-dimensional shape involving interactions between the side groups of various amino acids. 14. Which of the following is true of ATP? -ATP stores energy in phosphate bonds 15. A solution of pH 7 compared to a solution of pH 9 - Has more H+

Chapter 3 Quiz 1. A virus measures 100 nm in length. What is its length in μm? 0.1 μm 1 um = 1,000 nm 2. Which microscope is best used for observing the surfaces of intact cells and viruses? Scanning electron microscope 3. Which of the following is never useful for observing living cells? Scanning electron microscope 4. Simple staining is often necessary to improve contrast in which microscope? Compound light microscope 5. You are performing a Gram stain on gram-positive bacteria and you stop after the addition of the first dye. What is the appearance of the bacteria at this point? Purple 6. You are performing a Gram stain on gram-negative bacteria and you stop after the addition of the mordant. What is the appearance of the bacteria at this point? Purple 7. Which step in the Gram stain is the critical step in differentiating gram-positive cells from gram-negative cells? Alcohol-acetone 8. In microscopy, the term resolution

refers to the ability to distinguish fine structure and detail in a specimen. 9. The counterstain used in the Gram stain is a basic dye True 10. In a completed Gram stain, gram-negative bacteria are colorless.

False 11. Which of the following is essential for development of discrete, isolated colonies? Solid medium 12. Which of the following characteristics refers to the microscope's ability to show two separate entities as separate and distinct?

Resolving power 13. Acid-fast organisms such as Mycobacterium tuberculosis resist decolorization by an acid-alcohol wash because of the high concentration of __________ in their cell walls.

Lipids 14. A culture medium consisting of agar, peptone, and beef heart is a Complex medium 15. The source of nutrients in nutrient agar is Peptone and beef extract...