Examples of Multiple Choice Questions for Exam 1, Biology 250

Letters for correct answers are capitalized.
1. A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is
A. capsule b. cell wall c. flagellum d. peptidoglycan
2. When flagella are distributed all around a bacterial cell, the arrangement is called
a. polar b. random C. peritrichous d. encapsulated
3. A shiny, sticky colony of Streptococcus pneumoniae is likely to be
A. encapsulated and pathogenic c. nonencapsulated and nonpathogenic
b. nonencapsulated and pathogenic d. encapsulated and nonpathogenic
4. A bacterial cell wall does all of the following except
a. gives shape and rigidity to the cell b. is the site of action for some antibiotics
c. is associated with some symptoms of disease D. protects the cell from phagocytosis
5. The minimum distance at which a microscope is capable of distinguishing two points as separate is its
a. magnification b. illumination C. resolving power
6. A Gram negative cell wall is __________ than a Gram positive one.
a. thicker B. thinner
7. Because penicillin prevents peptidoglycan synthesis, it is more effective on _______________ cells.
A. Gram positive b. Gram negative
8. Flagella and pili are made of
a. lipids b. carbohydrates c. nucleic acids D. protein
9. The genetic information of bacteria is stored in _______, in one circular chromosome located in the cytoplasm.
A. DNA b. protein c. phospholipids d. RNA
10. Differences between eukaryotic and prokaryotic cells include all of the following except
a. eukaryotic cells have mitochondria c. prokaryotic cells have more complex cell walls
b. eukaryotic cells have cilia and flagella with complex structure D. prokaryotic cells have no genetic material
11. The fact that viruses are obligate intracellular parasites means that they require a ____________________ for reproduction.
a. culture dish B. host cell c. phenol red broth d. secondary virus
12. One way to determine the size, cell morphology and grouping of bacterial cells is to use a __________ technique.
a. streak plate b. phenol red C. simple stain d. nutrient broth culture
13. Cloudiness is a sign that bacteria have grown in a -_______________ after inoculation and incubation.
a. streak plate B. tube of nutrient broth c. Gram stain d. simple stain
14. The bacterial envelope includes all of the following structures except
a. capsule b. cell wall c. cell membrane D. endospore
15. All of the following structures of bacteria contain (or are made of) protein except
A. plasmids b. ribosomes c. pili d. cell membrane
16. Which of the following contains polysaccharide?
A. Gram negative cell wall b. pili c. flagella d. plasmids
17. Which of the following contains DNA?
a. Gram positive cell wall b. capsule c. pili D. plasmids
18. In a Gram stain procedure, bacteria with Gram positive cell walls decolorize less easily than those with Gram negative cell walls. A. true b. false
19. The cell wall type that has less peptidoglycan is
A. Gram negative b. Gram positive
20. The cell wall type that is most vulnerable to the action of penicillin is
a. Gram negative B. Gram positive
21. When flagella are located around the entire bacterial cell, the arrangement is called
a. polar b. random c. bipolar D. peritrichous
22. An encapsulated cell will reproduce to form colonies that appear
a. nonpathogenic b. translucent c. pink D. smooth
23. Endospore are all of the following except ___________ as compared to vegetative cells.
a. more likely to survive treatment with disinfectants c. more resistant to staining
B. more likely to die in nutritionally poor conditions d. more resistant to temperature changes
24. Phagocytosis of the bacteria that cause pneumonia is ____ likely if the bacteria are protected by a capsule.
A. less b. more
25. If you use a visible light microscope to examine a live culture of a bacterium possessing flagella, you will be able to see the flagella moving the bacteria.
a. true B. false
26. In what phase of the growth curve is/does a culture (use letters on phases of growth curve for answers):
most sensitive to antibiotics? a, B-exponential growth, c, d
have the maximum amount of nutrients? A-initial stationary, b, c, d
have the maximum amount of accumulated waste products? a, b, c, D-exponential death
have equal #'s of dividing and dying cells? A-initial stationary, b, C-maximum stationary, d
27. Most human pathogens prefer temperatures near that of the human body. They are called
a. psychrophiles b. thermophiles C. mesophiles d. halophiles
28. The optimum temperature for an organism is the one at which
A. it grows with the shortest generation time
b. it has the longest time between cell divisions
c. it is near one extreme of its range of tolerated temperatures
d. its enzymes begin to denature
29. The breakdown of glucose to pyruvate is called glycolysis and produces most of the ATP available from the glucose molecule.
a. true B. false
30. Energy is stored in the ATP (adenosine triphosphate) molecule in its
a. sugar portion b. adenine portion C. third phosphate bond
31. Organisms that ferment glucose may produce any of the following end products except
a. lactic acid b. propionic acid c. alcohol D. oxygen